I can vouch that the first of these was rad, and I heard good things about the latter.
I quite enjoyed MDAI, but it depends on what you're looking for. If you want a club drug, a pure 5-HT releaser isn't going to be your thing. It's certainly great for a laid back night in with friends or a significant other, or a few cocktails at a classy bar or something similar. In combo with DA and/or NE releasers/reuptake inhibitors it is much more "classically" empathogenic/entactogenic. Buphedrone & M1 both go well with it for that purpose.Really? I heard they all sucked unless you combined them with more interesting things.
Haven't tried the latter ones myself either, and i'm more of a fan of pure psychedelics as opposed to entactogens, though i do still enjoy them occasionally. Someday i may get around to trying the others, but i'm in no hurry.
i hope soeven so, that fact that it is substituting for psychedelics even more so than empathogens makes me think that it will likely be psychedelic.