I have done Bk-MDMA once on accident and it was garbage. Actually garbage is an understatement to compare it to Mdma, I felt absolutely no euphoria, talkativeness etc or any positive effects what so ever. Colors seemed SLIGHTLY brighter but that could of been a placebo honestly, it was just so annoying when your in the middle of rolling and not like a stimulated feeling kind of but no actual high I guess? & it lasted like 2 hours before I just went to sleep. Maybe I didn't do enough but it was horrible for me, never again I'll tell you that.
I really don't think there is too much out there on this one, tried to look and all I could find was either dodgy stuff or articles that look at home in Neuroscience and Pharmacology discussion that aren't worth posting because they basically regurgitate the same info... is this new?