Every coach is bound to have some issues. If it was well built using quality materials and techniques the small stuff will sort itself out either with you making the repairs or by playing the dealer fix it game.
The real problems come from the cheaply/lightly built units... look for particle board, veneers, and low-quality accessories/appliances. If they cut corners that you can see rest assured they did not hesitate to compromise where you can't.
On the other hand, quality manufacturing clearly shows. The use of Azdfell vs Luan {plywood}, one-piece fiberglass roofs, and endcaps, properly aligned coaches that drive, ride and handle well right off the showroom floor are indicative of a quality build.
As always.... opinions and YMMV.
:C