Once I fixed the things that the factory messed up, my 3820 seems pretty solid. I'm still struggling with trying to keep the wheel well trim piece screws from coming loose. Haven't figured all of those out yet. There's always maintenance like tightening wood trim, lubing wheel bearings, keeping the slides adjusted, etc. With the pex, the plumbing is pretty reliable. Have to fix seals every now and then, but that's pretty normal. These things take a pounding and don't benefit from the shock absorber suspension that is on the tow vehicle.