I have 3 pellet cookers, my primary one is a homemade cooker out of a 55 gallon barrel and a Pellet Pro hopper assembly. The other two are Traegers, one is on a long term loan from a friend of mine, I have had it almost 3 years now, and the other is one that I bought used for a price I couldn't turn down.
While I prefer to cook on my home made one, possibly only because I made it, I have been very happy with my Traegers. With that said, if I were buying brand now I would consider other, higher end, cookers, but I certainly wouldn't rule Traeger out.