No one has posted that opinion that I have seen. Thousands of houses have been built w/ Thermopane windows for a reason. I optioned them to help with keeping the TT cool along w/ slide toppers. TP windows are mainly offered on higher end units for a reason, they work! I can't offer first hand experience on the TT yet since it just came off the line. Waiting for transport from the factory.
Rockwood Windjammer 3002W (11/10/2011)
2011 Sierra Denali HD - Duramax/Allison
2006 Yukon Denali