The same can be said of plenty of imports too though. I dont think its entirely fair to single out GM and in particular the cobalt as the only car like that.
I agree that some imports are hit and miss but it's pretty well known that GM has been behind in nearly every car they have made for the last 20 years when it comes to interior quality. I think powertrain wise they have been pretty decent overall.
I think when it comes to interior quality I would say Audi/VW, Lexus, and Honda/Acura are near the top.
I've owned 2 Nissans in the past 5 years and I would say they are not very good interiors overall but I admit it and can live with some negatives.
Some things are not subjective. I try to make it to the Chicago auto show every year and you can see by day 3 of the auto show that GM uses cheap leather in all of their cars. By the end of the 2nd week the interiors of all the GM vehicles has major spider webbing .