We have a 2006 Keystone Sprinter 300FKBS. Have had no problems with it at all. Still looks brand new and spent the first 6 years of it in Northern Wisconsin out in all kinds of weather. We now have it in the Colorado high country (Creede, CO). The only thing we had to do was have Keystone replace one of the day/night shades as it was cockeyed. We take good care of it and enjoy it all summer long, so we do use it about 5 months full-time out of the year. All appliances/heater/air conditioner work yet. And we only have had to purchase new tires.