Nasty substance?? I find 2C-I to be an extremely comfortable and social psychedelic. It is one of the psychedelics that makes me feel like my conginitive abilities have actually been enchanced rather than diminished.
The one downside to it are the cases of mild HPPD-like symptoms it has been noted to cause. I have not used it in about 6 months now but I still have quite a bit of visual disturbances that have not seemingly started to diminish yet. There are some parts of the day where my symtoms seem to let off a bit. My symtoms are:
*Pulsing light in my vision. It is like static is constantly pulsing in and out in my vision.
*Occassional patterning in carpets, cement, etc, if I pay attention.
*Heavy white static in my vision at night.'
BUT: My vision is still astoundingly accurate. The only time I cannot read something is if it is at night and it is a neon glowing sign or something which gives off glare in which all I see is a big blob of light. During the day though, no problems. I have always had really bad glare problems, which has led me to believe that perhaps I am more prone to HPPD-like symtoms to begin with. (When I described all this to my mum, she informed me that my pupils have always naturally dialated enormously since I was a baby)...so perhaps the doctor dosed me a few hundred mics of acid upon entering the world = )
I used about 400mg of the substances in a 8-month period, and had a bit of the optmistic bias when it came to aftereffects, so hey, no sympathy for the devil

. I'm fairly certain the symptoms will diminish over time and even if they don't, I'll learn to live with them.