My wife's uncle has a Wildcat 5th wheel and has had a lot of issues with it. It's a very nice looking unit, but many small failures. Finally, they told him he had to take it to for factory service in Oregon (we live in WA).
I have a keystone product, it's ok. Nothing major, a few small issues, but it's not the most solid. We still like it, and hope to get many more seasons from it.
We had a Jayco before the Sprinter and we thought the quality of that unit was very good, we traded it because it was too small for our needs, and we couldn't get the deal we wanted a larger Jayco.
I think every brand has some issues, as you'll see on these forums.