I think my major problem with that DPMS Tuber was that it was my first AR that I bought. I agree that most any gun is worth owning, but the timing on this one was all wrong. I have shot AR's for years (mostly traditional Colts) and for a first buy a Tuber is a pretty poor choice. Sighting options are very limited, and shooting iron sights (my preference with rifles) is pretty mkuch out of the question. Right after walking out the door with the Tuber I knew that my money would have been much better spent on something much less of an oddball for a first AR. Sure, if I had the two AR's that I have now picking up an oddball like the Tuber might be fun, but as it was my timing on that rifle was all wrong and it was an immediately regretable choice that diverted funds away from a much wiser choice.
BTW, the Tuber was actually a nice shooting rifle, but the balance was way off (at least it seemed so) and I have a general dislike for fake cans.