I'll leave my experience while I'm here too.
I've taken this at fairly low doses (~6 mg, I only have a crappy mg scale) take orally. I just dumped the powder in my mouth, no caps.
The comeup was at times a bit uncomfortable physically. I have a desk job and mild back/neck/shoulder discomfort. The drugs seemed to make me more aware of the tightness in my muscles to the point where it was distraction; usually in my sober life I just ignore it. I stopped what I was doing and started stretching and it felt great. It really let me take the time to unwind my muscles and stuff. I feel similar "increased soreness" on LSD as well. Those in previous posts saying it is "feline" felt very accurate in retrospect.
Compared to similarly low doses of mushrooms, this was much more stimulating with the belief of having a clear head. Low doses of mushrooms tend to make me feel foggy, and weighed down, where as this gave me more of a rush and made me feel less inebriated than I actually was.
As other have mentioned, the comeup is fairly quick (within perhaps 10--20 minutes, I didn't keep track) and one time it really crept up on me and was a bit overwhelming until I relaxed.
At least once, the comedown was a bit anxiety ridden and I felt like I had too much energy. My mind was telling me I needed to go do stuff (which could be attributed to the fact that I was procrastinating on stuff). But, I definitely had a bit too much energy than I would have liked.
That's all the negatives. The negatives seemed to be more pronounced on lower-doses/on tolerance. Some doses were only spaced out by a week and, as expected, lost some of the magic.
The postives were great. I spent many hours with a huge smile on my face just reading. Everything seemed laced with humor and my mind could sniff it out. Visuals were fairly minimal at this dose, some minor wiggling of patterns. Music was great (I don't listen to much Hendrix, but I enjoyed Valleys of Neptune a bunch). With the light out, all my posters looked like Malevich's Black Square and I had a good time thinking about that.
Overall, definitely light hearted and didn't leave me feeling taxed or overwhelmed after the experience. But, it is, probably not 100%--bad-trip-free, but pretty close.