I've had 3 experiences with 2C-I now. My first experience was with 12mg, then 8mg at T+3:00. Intense visuals, minimal body load compared to the two times I have tried since, both at 16mg. One of those was oral, the other rectal. BTW, for anyone that cares, rectal 2C-I does work (no reports on Erowid so maybe I should add one), and the come-up was intense, at least by 2C-I standards. I was already at +2 at T+0:30, but the rest of the trip was similar in nature to the others, if only slightly shorter. I normally just take it orally, but I had eaten only hours before, where as I normally don't for at least 8-12 hours before tripping. And even with more then 12 hours fasting 2C-I still takes a good few hours to come up.
On a seperate note, one thing I have noticed about 2C-I it that music has made my trips less visual, but with amazing auditory effects. So it's almost a choice, listen to some amazing music and have fewer visuals, or kill the music and melt the world. But maybe that's just me, and I've only had 3 experiences with 2C-I so I'll have to see if the trend continues.