I bought two of these, just for fun, since they seemed really cheap and I needed something like that for recording and practicing in the studio.
I was quite surprised when I got them! It's easy to set up and really easy to put back together and store. I expected less since it's so cheap. The only thing is, while you sit on it seems kind of unstable, but it really isn't. It's just the feeling you get because it's made out thin materials.
I use it for practicing and recording all the time and would recommend it to anyone. In the backend, you also get a pull-out guitar stand, but I don't use it that often since you can't put an another instrument on it, while you're sitting on it.