Yeah, it's an odd one. The first two hours of my experience weren't entirely pleasant (a bit like a trippy fever / flu), so I can see why some might dislike it.
Once the peak came though, I was laughing at an Oswald Moseley biography, so it definitely improved.
It's a shame it isn't consistently good, it's very potent and very cheap. People sometimes find the first few hours of an AMT trip uncomfortable and vague, that pesky alpha-methyl is up to no good.
I didn't experience anything unpleasant from the trip as far as I can remember....... the unpleasant part coming from one chap turning into a complete prick and trying to fight me and my other two mates.
Thinking about it now though he probably felt a little uncomfortable as myself and two other pals are really close and he was just tagging along, also his underlying extreme paranoia probably didnt help. My own fault for asking him really, thought I was doing him a good turn as he doesnt get out much or have many mates, unfortunately I found out why thats the case..