You've had nice trips with this and small doses, but the experience the guy that wrote the review experienced, certainly doesn't sound like much fun, especially after 20 hours and he still can't move? I would never want an experience like that.
The things the guy wrote kind of reminds me of when I tried Salvia divinorum, (which I did three separate times all told). I don't care for the salvia trip at all. I didn't find anything enjoyable with it, just a very strong feeling of constantly being pulled to one side, and little people mocking me about what I'd done to myself lol. Thank goodness it's a very short trip, like only 5 minutes or so, but VERY intense!
I really liked psychedelics as a young man but haven't done anything in years.