My first was a Sunline. Built well and never a problem. Last 2 are Keystone products. The Cougar and now the Montana have served me well (knock on wood). That said, the next one I buy may be FR. I really like the Cardinals and Cedar Creeks. Then there are the newer Grand Designs. Heartland and Jayco too. My point is, I'm not going to waste a lot of time trying to figure out which one is built better. I'm going to go with the floor plan I like and take the plunge. All the manufacturers make bad ones sometimes. I'm of the belief that they're all pretty much the same.