We've been on 2 trips with our 2009 31QBS and both times the front and rear bedroom sliding doors have moved or come off the track. The plastic straps and snaps are not strong enough to hold the doors from sliding. I took it to the dealer for a few minor warranty repairs and they told me there's nothing they can do since it is designed that way. I am going to install barrell bolts on the doors to secure them to the floor and keep them from coming off the tracks. I was surprised the front bedroom door did not put a hole in the wall when it flew off the track. It seems like the factory needs to come up with a better way to secure the doors.