Have done this stuff 20 times +. I'm really enjoying the effects. Not crazy at all, as peaks on methylone can be, but pleasant, comfortably speedy (not too speedy) and has a real nice body feeling to it. Great chills up the back and neck

Clearly has both stimulant and empatogen properties, absolutely perfect for socializing, parties or on clubs/bars as you're in control and not too speedy. Goes great with drinking (moderately of course).
Only partly bad thing I can say about it is, I have absolutely no appetite on the stuff, sometimes not even the day after, although I feel great afterwards and can continue the next day with only a couple of hours sleep. Hasn't had an effect on my mood either, I actually was on 4-FMP last night, when I'm writing this, and I feel on top and can't even feel I was on it last night.
As for the neurotoxicity I have only heard speculation, but it seems like the common conception is that the toxicity is very low, as is the release of neurotransmitters, evenly spread on serotonin, dopamin and noradrenalin receptors. This is what I've heard from people I know, who are into rc's, but I have no links or references whatsoever. Can anyone comment on the neurotoxicity and receptor activity in any way?