Had a few little things go wrong in the first year when we first bought our 2011 831RLBSS. Been fine ever since. It's been towed (literally) from the west coast to the east coast a couple times.
Oh wait, it needed a new battery and a touch of brake work this year. I guess that might count as a "problem".
Quality is a relative term for me. There's the appearance of quality, the proven reliability of quality, the wife's impression of quality, etc.
I have no illusions though; my Flagstaff 831 is nice looking, a great place to spend some quiet time and tows well, but it sure doesn't give you that "I'm going to last forever" feeling.....
I'm pretty fastidious with maintenance though (greasing bearings when on a trip, inspecting/sealing roof every few months, winterizing, cleaning, tires, etc, etc), maybe that has something to do with my trailer being relatively trouble free.....