I have only done 2C-E of the phenethylamines. Didn't feel much like ecstasy to me, and the trips generally made me feel really 'on edge'. The time I tripped the hardest I could barely remember where I was or what I was doing. When I asked a friend of mine how he felt on it he replied that he didn't want to talk about it. There were some mild visuals and I recall seeing 'fire flies' in the air, faces on textures and at times objects would appear to move. (Butterflies on my shower curtin appeared to be flapping their wings). Closing your eyes would bring you to an alternate reality.
Just start off with 15, maybe even 10. It is important to note eyeballing these dosages is a horrible idea. I thought it would be easy too, but in reality the powder is fluffly and inconsistant.