about the first three times i rolled (esp. the first time) it took like 15-20 minutes to hit me,a nd it hit me hard....and recently i think i've had some MDA or MDEA and not MDMA b/c it takes like 45 minutes to hit me..and while MDMA woudl hit really quickly and hard, it would last for about 4 or 5 hours and not peak till at least the 2nd hour...the other shit usually peaks about an hour and a half after i take it, only 30 minutes after it kicks in, which really sucks. so my feelign is that if it's pure mdma, it will hit you fast and hard.