The research chems from PiHKAL are very all over the map in terms of effects and psychedelic usefulness. I've eaten a smattering and have different opinions of all of them. The absolute best is 2C-E. It is harsh and unforgiving and some find physically nauseating at the onset (go puke, you'll feel better), but it is focused and crystal clear and heavily encourages introspection. It's an acceptable party drug and can be fun in a woo-I'm-high sort of way if you force it to be that, but it tends towards an experience which is a lot of work for a lot of reward. This is something you can eat to make serious progress. You will see below the surface. 2C-I is rather the opposite. Friends of mine call it candy... light, visual, focused on your altered-ness. Very "dude, everything's glowing" type thing. Fine to dance on, wouldn't have a 2C-I gathering at my place though. DOI, the amphetamine equivalent, is very open ended. I've noticed it encourages vibe in a group... everyone gets on the same wavelength naturally. It's also a non-mindfuck... definitely a psychedelic, but won't drop you in the ocean to sink or swim. You can eat a really high dose of this and operate your microwave without using all of your attention. Very natural feeling, no body load or displacement, but a lot of "work space" by which I mean that an experienced traveler will know where and how to look for the effects he wants. You can turn inwards and go very deep, but when someone asks you a question you can slide back into interpersonal mode no prob, then head over to where your buddy's rocking the decks and dance like you're on acid. Opens up a lot of channels with no overload... kind of a waste on newbies since getting the full worth of it requires understanding and drawing up whatever parts of the psychedelic state you need at the time. Won't get you off if you're looking to get bombed, and a bad choice if you were thinking of sleeping any time in the next couple days or so. I've also sampled another psychedelic amphetamine which I have reason to believe is DOB, but I've unfortunately found impossible to identify with certainty... it was unconscionably sold as acid to a friend of mine and only myself and other experienced persons recognizing amphetamine action and duration make me confident saying is was for sure DO-something. While not exactly unpleasant, I found it stoning, neurotic, and overall unrewarding, and also noted that what psychedelic element it had ended at around 1/3 of the total duration. With a dose-dependant duration that can easily reach 40+ hours that's annoying.