Reporting in..
TL;DR: most of the negatives of aPVP with hardly any of the positives besides a very similar sexual arousel, and almost-as-long-lasting stimulation (stimulation does not mean euphoria). Read the post if you want confirmation that I have done my homework. Don't waste your time, regardless of my report even the chemistry/biology behind the structure says it would be mediocre at best compared to more solid chems and my experience, as well as others across the internet seem to confirm that. Plus the synth technique is either not perfected, or the lab making this does not give two cents if you die from some large amount of gross impurities.
I recently got in an order of MDPHP. Now this being a brand new chem, I was weary that it would even be MDPHP, rather than something else or perhaps something inactive because the synth was bad. As far as my experience goes... I have been a core member of the RC scene since Russian Phenazepam hit eBay in 2008, I went hard, getting some very very good sources, until about 2012 and took a nice little break. Drugs are not really sustainable if you want to live a long life, especially these fucking PV compounds. Jesus I thought 4MMC was compulsive, this shit is the devil (but I love it, and I love porn and sex and music too

) I've tried almost every drug in the book, legal or illegal (besides the shit compounds that were very toxic or not worthwhile) and I've abused probably a little over a half dozen of em. Alas after this recent stint with aPVP/MDPV/MDPHP I can blatantly tell it is affecting my dental health among other things. Like I said, most drugs besides maybe marijuana aren't very sustainable unless you are Tony Stark. But I digress ....
I have read conflicting reports on aPHP but the consensus from "seasoned" users seems that its mainly a waste, not as euphoric as aPVP or even some older, better chems. That said it seems aPHP has some decent qualities and isnt half bad. I never got a chance to try the tan MDPV (wasnt all that into potent stims back then) but I have tried many batches of the pure white MDPV from many trusted sources, I liked it, but found it more serotonergic than aPVP, it made me more creative, had less of a rush and couldn't be abused long term as easy (although all the PVs are evil honestly.) Something to note: I get RXs for benzos because of extremely bad anxiety, yet I love stimulants. Most stimulants are 100x better when mixed with benzos... but the PVs I actually prefer to enjoy vanilla, no downers until I have been up for 3 days and need to sleep for the sake of my sanity.
I figured one extra extension to the chain on MDPV, to make MDPHP might make it weaker, or maybe more adrenic but could still be fun so I took my chances and ordered some. A few people here and there said MDPHP was "near inactive" or " a waste" and a few people elsewhere said they "felt like a god on it." None of those people who liked it were seasoned vets in my opinion.
Anyways... the batch showed up, and it literally looked like dirt... AKA soil from the ground. It looked like nutmeg. It was poo-brown, super dry but did have an ever-so-slight yet distinguishable PV smell to it, similar to the white MDPV. Obviously it was impure, but being that it was my only substance in possesion at that time, and I wanted to know if it was hit or miss I ended up going for it.
After allergy tests I tried vaping it. It vaped horrible. No trailing down like MDPV or aPVP, the vapor/smoke went everywhere, was EXTREMELY harsh despite any efforts to minimize heat/combustion. If you tried to inhale too soon you actually ended up getting very tiny particles of the poo-dust in your lungs, and when mixed with the harsh smoke would put even the most veteran smoker into a coughing fit.
Nonetheless I kept going making sure to give it a chance. It was gross. Also, as it slowly melted away, it left behind HUGE amounts of impurities which very quickly turned black...... after 4 hits it looked like a tar pit.... fucking disgusting man. Tasted like PV mixed with sandy vagina.
The effects from the first vape session were minimal. Light stimulation, an even lighter sexual arousal, no creative energy. Anxiety/physical side effects were on par with the white MDPV/aPVP but with such little positive effects I was disappointing.
Being the dumbass I am I then ground some up for insufflation. It burned a little bit, and being so dry and light a bit went into the lungs. Also, tasted like ass. Watch out because this stuff is just as caustic to the flesh as aPVP. I would highly NOT recommend snorting it.
However... snorting it did produce much stronger effects. After 3 mini-lines, I was pretty darn stimulated, and had a solid amount of sexual arousel. However the paranoia was very present and quickly. After eventually doing a few more baby lines about 25 mins later, the sexual aspect was pretty much on par with aPVP, and there was stimulation, but no solid "good" euphoria. It felt dirty, like it was "something to get by on."
I did not want to snort anymore, not just to prevent my septum from dissapearing, but god knows what those black/brown impurities could be. I tried a few more vape methods & session, and was able to eventually produce stronger results from vaping, but it required ~3x as much chem to produce even relatively similar stimulation to aPVP or MDPV. Again, there wasnt a good euphoria, rather a heavy stimulation, anxiety, physical strain, and some paranoia (although the paranoia happens with other PVs too quite easily.)
At this point I was conflicted. I know better than to keep putting it in my body, but wanted so badly for this to be a winner. I was also pissed that such 'popular' vendor is willing to take your money in exchange for this horse shit.
That's when I got the brilliant idea of doing a super-ghetto recrystallization. While I figured I would end up losing like ~60% of volume of substance, at least I could then work with A) a less dirty version B) better ability to really see if this was worth while or not.
I did manage to clean it up a bit, lost a lot of volume but was cleaner, easier to work with. It vaped better, tasted better etc. Still the effects didn't change really, I was just able to produce them easier (and this is all ASSUMING that it was also MDPHP and not some other random shit.)
All in all, I did NOT find this to be worth while, or worth the money. Honestly, unless I was fiending worse than ever before, and someone offered me this for $2 I would probably pass on the offer no question. Even when cleaned up and such, it was mainly an adrenic stimulation, no real euphoria, heavy on the body load, & still did not vape as well as any other PV I have used. There wasn't much urge to compulsively redose like aPVP or 4MMC, but once it started wearing off after about 1-2 hours, and my body would start shaking and becoming irritable THAT is when you want to re-dose.
I would not reccomend wasting your time with this one, at least until someone gets a CLEAN proper synth and claims "its the bomb shit." My guess is even a pure synth would reveal this to be less than exciting. Remember, most people who rave about MDPV do so about the tan batch, and say the white stuff is "alright." I MUCH prefer aPVP to MDPV and MDPV -> MDPHP based on my experience seems on course with aPVP -> aPHP and what others say. MDPV was much creative, a had a very noticeable 5HT aspect to it, at least in comparison to aPVP. While drugs with serotonergic aspects are very fun, they are very hard to abuse consistently. Whereas aPVP, while causing paranoia, loss of sleep, loss of apetite etc; you can go harder for longer. It's not as creative or motivating, but just as euphoric and sexual.
Hope that helped someone from making a stupid decision.
Update: After further trials with recrystallization (i had 5 grams, and only tried to purify about 1 the first time) it DEFINITELY vapes like aPVP now, smoke trails nicely, and the left behind residue looks just the same as aPVP does. That said..... the effects are still very heavy on the body, headaches will eventually come, still not much euphoria, but at least my lungs don't feel like I was in a furnace all day.
Still not a worthwhile chem, unless of course what I got was not even MDPHP, we may never know. Like I said near the start of this post though, aPHP seems to be mediocre at best when reviewed by the veterans of the RC scene and the people who rave about it probably haven't been around long enough to know the "golden age" or RCs, which is a generalization and I might receive some flack for it, but I really don't care. I look at it like a political libertarian: regardless of marketing, the good chems will eventually get popular and the shit ones will not. There is a ready PV8, aPHP, MDPHP etc have been around a while and have almost NOTHING on them, because they are shit.
as all the people I know who tried both MDPPP and MDPV found MDPPP much nicer euphoria wise, much cleaner etc, same for a-PPP vs a-PVP - the only downside was potency. But once you get 4-carbon chains and beyond you lose *both* potency and euphoria, at least going by all the other related substances currently available. I hear this is the same, similar to a-PHP if anyone liked that, and not quite as good as the original MDPV but may suit some people better depending on their preferences.
Exactly my thoughts. Seeing as how there are a decent amount of people saying they enjoy MDPPP, (which is a reverse of chain size, as opposed to increase in the case of MDPHP) it makes sense that MDPHP (and to a respective extent aPHP) is more body-heavy, less euphoric etc.
Even with a proper oil burner, and a purified batch which vaped nicely, MDPHP was still a loser (but active.)
Do not waste your time. I really love aPVP ( not a fan of the MD-Ps i prefer them without the MD bridge) but the paranoia sucks, plus if snorted it destroys your nose worse than EPH, when eaten it irritated your stomach and if parachuted it irritates your esophagus, if vaped it destroys your teeth and lungs.
I have yet to try aPPP, or MDPPP, but I do have some aPBP on the way and since this is a 1-less decrease in the chain size, so the exact reverse of aPVP - aPHP I am excited. I have heard conflicting reports and I am scared since not too many people have reported on it. However a few veterans I talked to very much enjoyed it and preferred it in all respects of aPVP. Luckily having a job means I can afford to do dumb shit like this....
Edit2

osted an arm-chair review of some high quality aPBP over here :
http://www.bluelight.org/vb/threads/618682-a-PBP-(alpha-Pyrrolidinobutiophenone)
It was a decent chem if you no longer have access to PVP. I have yet to try aPHP but judging from the reports, I would say aPHP is a better bet if you are looking to replace PVP.