Iv'e tried 20x a couple of times, really liked every bit, I often had like audiotary trips because I could just hear birds constantly. It's a strange drug, nothing can really describe it, you have to try it to know what it's like and even when you have you can't describe it. It's strange because you do involuntary things and you are perfectly aware of what you are doing. My friend had some and was leaning forward by all of our feet and he thought he was a shoe and we all were to and he was talking to our shoes. However its probably the funniest drug youll ever have, not even some killer weed is going to make you laugh as much as it.
The most intense experience I had from it was when we were in the woods by some bike trials and I was in a dug out hole in the ground after I smoked and it felt like I was being pulled down into the hole and I couldnt get out, but it was the funniest shit ever at the same time and in no way was it a bad trip. The "trip" lasts about 5 minutes and you feel really stoned as its coming down for about half an hour.