I had great, nay, awesome times. I sat in baths and held hands for 6 hours, i cried because the world was SO beautiful. We had some real trippy ones once, i had dragons (like the ones from pitch black) fly around me, and spent an hour talking to a Ville Valo poster. Just, beautiful.
There are risks attached to pills, risks i feel that have been increased through misinformation (leah betts, an unfortunate example, died through OVER hyrdration, after being warned about dehydrating). It's a fine line, and i've had minor swellings from over-hydration. The biggest risk is that you get involved with some horrible, downright disgusting people, imo. I've seen people who've been happily taking them for years, and i've seen people **** and puke blood (this was from pretty heavy mis-use, mind. Not 'normal').
I'd never reccommend Class A's to anyone, for the same reason the person who gave me them said. You lose the fear, and that really opens the gates to everything. If you do do them? Stay safe, do it with people you know, who've done it before and just be aware of what your body is telling you. And buy a pack of gum/baby's dummy.