Having spent the last 12 days constantly ploughing through 3-FPM I can attest to its slight moreishness.
Two things are particularly notable about this drug. It's just as horny as MDPV ever was. And it's ability to build tolerance is beyond any other drug I've ever taken. As Sprout and others have noted, the doses go up ridiculously, and ridiculously quickly.
Such a sex drug. And it's not even as debilitating to erections as other amphetamines. Of course it is to a degree, but considering its horniness, with a little Cialis thrown into the mix, it's not frustrating.
It's far easier on the heart, palpitation-wise, than MDPV ever was, or most other stims. And recovery time is quick. I only ever felt shit after the first all nighter. I find food, in small amounts, can be easily forced down if necessary. And it's been necessary. I haven't eaten a proper meal since I first started 12 days ago. I'll eat tonight. I've slept some nights, a bit, and other nights I haven't. I honestly don't have the right to feel as good as I do after such a binge.
Because of the increased doses needed I wouldn't pay the rip off £20 a g some vendors are asking. But £7-8 a g, as others have offers for, makes it incredible bang for your buck. Literally.