I like how nobody here has bothered to mention the dangers.
I've done 2C-I, 2C-E, 2C-C, 2C-D, 2C-T-2, 2C-T-7, PMEA, MBDB, BDB, Methylone, 5-MeO-AMT, 5-MeO-AET, 5-MeO-DMT, 5-MeO-MiPT, 4-AcO-MiPT, 4-AcO-DiPT, 4-AcO-DET, 4-HO-DET, 4-HO-MiPT, 4-HO-DiPT, AMT, DPT, and DiPT that I can immediately remember and the only ones that didn't have significant side effects were 2C-C and 2C-D. The rest had things ranging from nausea and vomitting with 2C-E, 2C-T-2, 2C-T-7, 5-MeO-AMT, 5-MeO-DMT, AMT, and DPT to being more tweaked than I've ever felt off of anything from 2C-I, getting severe diarrhea with 5-MeO-AMT, having tremors for hours with 4-AcO-DET and 4-HO-DET, overall weird body feelings with 5-MeO-MiPT, inability to urinate for four hours as well as feeling like my body was way overheated with 4-HO-MiPT, headaches, extreme trisma, and painful head twitches from 5-MeO-AMT, blackouts from BDB, excessive CNS stimulation from 5-MeO-DMT, 5-MeO-AMT, Methylone, 2C-I, 2C-T-2, 2C-T-7, 2C-E, and DPT... And that's just the tip of the iceberg.
The worst thing 2C-C ever did to me was trigger a panic attack when I took too high of a dosage and 2C-D was by far the most benign of them all.
Sure, its fun to look at pretty colors for hours on end but is it really worth the possible damage to your body? Oh yeah and don't let me forget this one - 2C-I affects blood clotting for many people. I cut myself one time while on 2C-I and it just seemed like it wouldn't stop.
I don't think its fair to sit here and tell just one side of the story. There are plenty of downsides to research chemicals. They're called research chemicals for a reason - they have never undergone a thorough clinical trial to determine their side effects and nobody has any clue at all what their longterm effects may be. Also, some of them have shown some real evidence of addiction - I've been addicted to a few that I can name including 2C-I, 2C-E, 5-MeO-AMT, and AMT and I've heard that I'm not alone in this.
Personally, I'm glad they're not easy access drugs anymore. Flame me all you want but even with all that I've done, the good times and the bad, I am very happy that stupid kids (such as myself back then) can no longer obtain them as easily and while I'm against scheduling for the most part, I believe that 2C-I, 5-MeO-DMT, 5-MeO-AMT, 2C-E, and 2C-T-2 should all be scheduled. They're not toys. I've had trips on all of them that blow all of my other trips besides AMT and 2C-T-7 (which are already scheduled) to shreds and I don't think the vast majority of people can handle trips that intense. On top of that, they all had some nasty side effects.
Think about it this way... Pharmaceutical drugs are thoroughly tested for side effects, benefits, etc., before being approved by the FDA. Now some of the most common pharmaceuticals that were previously found "safe" are being shown to have some rather nasty effects on the body and mind later in life. Anybody remember Aleve? Great pain reliever, once thought to be extremely well-tolerated and safe. Well, guess what? Its bad for your heart and increases your risk for a heart attack by a significant percentage. All that it takes for "approval" of a research chemical is someone willing to synth and sell it.
One last thing... You're ordering chemicals from "companies" that are generally run by one or two people committing crimes way above that of just a single felony charge. We're talking many multiple felony charges here, folks. Who's to say that the gram of 2C-I you got is really a gram of 2C-I and not some mixed bag of different RCs and/or precursors/intermediates? 99.9% pure means nothing without a true lab analysis (via GC/MS and other scientific methods) that truely shows its contents. I've bought RCs before that definitely weren't pure and they illicited some extremely nasty side effects each time they were taken until I finally disposed of them. Who knows what other crap was included inside my "99.9% pure" research chemical. I don't think I'll ever know.
