I bought a Summit BushMaster a few years ago and I think that the quality is very good. The thing that I don't like about the stand is that it doesn't have a back rest or a shooting rail. At the time that I bought it, I just didn't do a whole lot of shopping around so I really didn't know which options I would want...
I would recommend a Summit treestand, but my advice would be to buy one that at least has a back rest.