I believe I had my first 2C-I experience last weekend. However, I cannot be certain, as I do not have a test kit. Felt like I was floating a lot of the night, had very nice subtle hallucinations, nothing overpowering. Peak time lasted approximately 5-6 hours, energy was pumping for a good 7-8. I'm curious of other people's experiences, as I want to be as sure as I can if what we had had any 2C-I in it. I've read up on some experiences, but it seems most people get very very intense hallucinations.