My Vista has them (an option listed on the MSRP printout). Having had coaches both ways, I much prefer double pane. Here in the Reno NV area, even in the summer, nights can get really chilly. While condensation isn't that much of a problem here due to much lower humidity, The fact that in a MH you are sleeping in such close proximity to a window makes the double pane noticeably more comfortable. In our previous single pane coaches, you could feel the cold air sliding off the single pane glass at night, not so with the double pane.
