I do not use my coach full time and probably never will, I like having a place to come home to, just habit I guess. I currently live in and have camped mainly in Northern California, summers are routinely very hot, 100 plus days are quite common. I fall into the category of never having had dual pane windows in TT or FW and probably never will. Not that I don't think that they would be quite nice but more that I have never had the need for them. My GW is the first RV that has dual ACs and have only used them once but I know they will be nice in the future. Sweating windows has not been a problem for me in 20 years but I do not use my FW in extreme cold climates. When I lived in Virginia, my dual pane aluminum sliding door would form ice on the inside during the winter on a cold windy winter day over the aluminum framing, not the glass. In my home in CA, to improve the insulation value of my dual pane windows, I had to do away with aluminum framing to get to where I wanted to be. On a 100 plus degree day and when the sun is hitting the side of my FW, I can find the frames quite easily in the side of the FW. I have the frameless windows with a tint that also greatly reduces the heat transfer, and the awning helps as well for both the frames and the windows. If I were living in the FW full time, I would want the dual pane windows but as things are now, I have never wished I had them or felt the need for them but again think they would be nice.