I dont have much experience with the latest batch of RC's, however I have trialed 4F-pvp twice now and I'm quite please with the results so far. It is certainly a stimulant, but for me it is a very relaxed, chill, manageable in addition to possessing some decent euphoria. Pros: Mellow come up and come down, very few side effects noticed so far. It hits quickly when insuffilated but has never felt pushy or overwhelming. I provides a surprisingly clear head space and does not cause problems focusing or following a train of thought.
For me personally, it allows me to sit down and get a lot of writing done. It improves my typing skills and keeps my brain pumping out ideas. I do have to avoid tangents otherwise i can get off track but it lacks the chaotic, head scramble of meth or heavy coke use. 4F-pvp is different from most other stims ive tried, it lasts longer than cocaine and does not have the same kind of constant push to keep redoseing, only to stop when it's all gone. There is some desire to redose but after the 2nd or third booster the diminishing returns start to become really apparent. You hit a point where it just doesnt feel worth it to continue, which i think is a strong positive.
So far this stimulant has been a breath of fresh air. I would advise cautious optimism about this particular chemical flower.
CONS: So far the worst it has to offer are some minor headaches, fatigue, and some nose/throat irritation during the comedown and possibly the next day if you dont get any sleep. The duration of the peak effects are somewhat short, estimate 2-4 hours, but closer to 2 hours. I have not noticed much of a comedown both times, eventually after you stop dosing you just get tired and want to sleep, however, the residual stimulation is still present after the peak is over and can last several hours depending on total dose and all the other factors. I recommend having something to help you sleep at the end of the night. This stuff is somewhat similar to Ethylphenidate, the really good euphoria and strong buzz are relatively short lived while the leftover stimulation lasts several hours longer.
Neutral: My sample was very pure white in color. It has the texture and consistency of very fine powder. No crystals are visible. The powder is very fluffy, it seems to have a very high volume to weight ratio. It will clump up slightly but it does not seem hygroscopic. It has basically no oder, almost no taste, but it does burn the nose. Ive tried a bit orally but later snorted some small lines so I cant really give much info about oral dose, duration, effects, side effects. Though on my second trial i started by taking 40 mg orally and then 20 mg up the nose to kick things off. It seemed to produce a nice gradual build up of stimulation and euphoria.
Conclusion: I think this stuff might have a decent future. Ive not taken a-PVP or MDPV before so i can offer no comparisons there. I have used all the common stims and a few obscure ones but this was my first outing with anything pyrovalerone based. Whether it succeeds or fails im going to enjoy being one of the few to sample this novel substance.
Cheers and explore safely.