I have a 2012 NT 28rls and have alot of complaints about quality of materials and install of items. plumbing leaks at kitchen sink supply lines,outside shower supply leaks, the holding tank flushing systems vacuum breaker stuck and leaked the gutter run off filled the water heater. the steps broke. now the rear axle has lost its camber and the tires are leanining in at the trop and are cupping. there is a lump in the side wall near the roof.the exhaust vent louver broke at the hinge pins.my dealer has been extremely helpful and is taking care of these things but i feel the unit is not going to last. my last trailer a jayco gave us 6 years of trouble free camping where everytime we go out i'm either fixing something or calling the dealer