Home Forums Hunting & Shooting Gunsmithing Mossberg 500, 535, 835: what are the problems you've seen?

I am thinking about getting a Mossberg 535. I thought I would ask here from the guys who have to fix these things:

What problems/weaknesses have you seen in the Mossberg pump shotguns? Are they inherent to the design, or simply poor execution? Are they easy to fix?