We have a 2015 Thor Challenger 37ND, have been back to the factory 2 times and going back for a 3rd. time, really bad fit and trim, this coach is billed as a luxury coach(a joke)only 2 major issues oil leak from oil cooler and shock towers only hand tight, most issues were minor, drawers not tight molding coming lose bay doors leak just minor stuff but to many to list,(17 plus first trip 25 2nd trip) each time at the factory stayed their a week plus, now headed back for leak from washer hookups that has damaged outside kitchen plus other items, people @ the factory have been really nice to work with have addressed all issues, this coach has a super ride and handles great, don't have to worry about semis when they pass, 7plus fuel mil. after taking the Newmar factory tour and looking at them think I would buy Newmar