LuckyHat,
We had problems in the past with single pane windows... in some other brand of RV... but I doubt the brand of RV mattered all that much... because the windows were made by the same company...
During the summer months, with the humidity high and the A/C running... our windows would be covered with water drops on the outside.
During the cold weather months... we experienced that moisture on the inside of the RV... running the glass, making a puddle in the window frame channel.
Both cases it was difficult to see out the windows... Which is one of the reasons I wanted Dual Pane Windows in our BigHorn. Since we made that decision... I have found they really soften the sounds coming into the RV. So in my view... I got Double service from our decision... We have lived full time in our BigHorn for over 2 years now... and the windows are clear as the day we picked it up.
Marv