My experiences with TMA-2 have been in the range of 40-80mg. I've tried it at least 6 times, and each of my trips were similar, but quite unique. I found at the 40mg range, it was a pleasant high, with some nice visuals, nothing like acid or shrooms though. Almost like it was computer generated. As you increased the dose, the visuals also increased. I did also experinence some of the amphetamine type uncomforts, but not nearly as strong as if I was doing crystal meth, quite easy to handle. I loved the mental state it put me in. Quite unlike acid or shrooms, which I love for their own aspects. But unlike shrooms or acid, which I find experiences to be, sometimes, quite like a mirror being put up to you, baring everything before you, whether you like it or not. You are forced to deal with it, or face having a very bad trip (unless you have some real good friends around to talk you down). TMA-2, on the other hand, you are able to sift through everything in your mind more easily, focusing more closely on certain things. Almost impossible to have a bad trip like acid or shrooms (unless you mix it with other drugs, which is another story for another time). While not quite as enlightening as the tryptamines, with a more "chemically electric" feel to it, it is definately worth trying.