I've had my XT276 out several times now and other than a very few minor detail items, no problems.
All the appliances incl. stove, frig, tv, dvd, stereo, slideout, water heater, plumbing, A/C, lights, doors, screens, windo, stabilizer jacks, locks, propane, outdoor grill, etc. function as designed and no leaks.
Minor detail items - scuffs on acouple ceiling panels, plastic door jamb cracked where stapled, needed to mouse proof (steel wool) where plumbing/wires come thru the floor & adjust front door closure strut mount ~ no complaints.