how bad is keystone?

We have a 2006 Keystone Sprinter that we bought new. Have had no problems with it, except to have one day/night shade replaced. Have never had a leak, the interior is still very nice and original, all appliances and heater and air are still working. We use it about 4 months out of the year and it has been stored outside (occasionally in below zero and snowy weather)except for the past 2 years we found a reasonable indoor place to store it. My husband keeps up with any maintenance and cleans the roof and waxes the trailer at least once during the year. It looks brand new. Every brand of trailer or 5th wheel will occasionally have problems. I guess we have been very lucky.