I think you can get a Lemon on any brand Rooster. Odds do hit on even the most popular brands.
My friend in 2003 bought a new DutchStar by Newmar. He did not have any problems with the chassis, but he sure had problems with the house part, cabinets coming off their securement, same with the microwave oven. He claimed it was a lemon, but the dealer did not consider it a lemon, but they sure took a long time to fix all the problems.
So what some owners consider a lemon might actually be a bad dealer that do not give a darn about the coaches they sell once they leave their grounds.