Decided to give it a go on it's own;
IV'd what could be anywhere from 20 to 50MG - (very fine) crushed crystals in powder form took up 10 units in a 1ML syringe before adding water (removed plunger to fill) , and that with no compression.
Took 2-3 minutes to dissolve entirely in 1ML.
There is a slight rush, and the high is quite tweaked, clear-headed, but bears the same enthousiasm one would seek with MDMA - I'd say stimulation wise what I dosed is comparable to +-150mg MDMA, and enthousiasm wise it's more like 75mg MDMA. I can't compare it to meth but in comparison to speed it's "sharper" qua headspace and has a more tweaky feeling, but the rush felt seconds following administration isn't as pronounced - and compulsive redosing is defo a one-way ticket to stim-hell (unless you've got an arsenal of alpha/beta blockers, hypotensives, vasodilators and anxiolytics).
Around T+90min I developped a bellringer that slowly faded over 15min. The high is (IMO) very enjoyable, and through this ROA lasts about 150-180min.
Big downside is the following vasoconstriction (becomes -very- pronounced after the 3H mark) - it litterally grabs you by the balls -, heartrate is high but pulse is weak, there is agitation that in my case lasted a good 5 hours, and the kidneys clearly are inactive - no pee production for 7 hours after consumption of 2L fluids and 4 units alcohol for diuretic effects and vasodilation. In my case there also was lots of tension in the muscles (forearms, shoulders and lower back).
I do not recommend redosing more than once with this one, and IME it should be threated with respect, as the high is very enjoyable (IMO) but trying to hold onto it gives places to side-effects too pronounced to just mess around with it.
If you intend to sell this as something else, don't be surprised if the cops knock at your door because some kid OD'd after a dose that would've been forgiving with MDMA.
Edit: 100mg to 50mg