MDPV is great if you respect it, if you don't it'll bend you over and mistreat you.
I'm on it right now, again, did a bit this morning at around 10 to motivate me to send a few job applications, then made the mistake of putting some porn on, had my last dab at four thirty, managed to have dinner and a few beers, might be able to sleep at some point in the night.
When I stick to a single oral dose I have absolutely no nasty side effects, sleep is easy, I mean a couple of beers and I'm fine, however if you do get compulsive then you'll probably end up missing on sleep and food for a while.
I also always stick to taking it orally, smoking and snorting are just way too compulsive.
Oh and to answer Jesusgreen questions, good coke for me is way more enjoyable than MDPV and so is mephedrone, only thing is that I feel MDPV to be quite a benign stimulant, I mean mephedrone might be euphoric and enjoyable, but I also feel it's toxic and is doing no good to my body, MDPV is very subtle, on low oral doses you don't even feel like you're on something.
MDPV for me is the ultimate ADD self-medication, a little dab, and bang I've got all the motivation and concentration in the world.