Out of all of the RCs I have been able to experiment most with 2c-i. I've had it orally multiple times at varying dosages (3mg - 27mg). And insuffulated a few times. If definately is euphoric and I have experimented enough to know right dosages for different situations. My concert dosage is 12-18mg orally while my night at home dosage is 18-27mg orally. I have recently began experimenting with Rectal Admin. My first trial was 7.5mg. Good effects. Had some of the difficult "have to poop" feeling that people get. 2nd was 9mg. Noticeably stronger in both negative and positive aspects. Then I realized I could cut down in the amount of liquid by having a higher concentration solution and I just experimented tonight with 10.5mg in 3.5 ml of DI Water. The negative "having to poop" feelings were almost completely gone and I had an AMAZING experience.