We have a 2012 Timber Ridge 240RKS. We didn't get the double pane windows, and don't deliberately camp in the winter months, but we do camp well into the shoulder seasons where we sometimes get snow, and nighttime temps into the low teens or single digits. The TT does great in these conditions other than a little condensation on the windows. My last trailer I had the gray water line freeze and break on me in similar conditions because the dump valve wasn't in the heated underbelly.
As for Timber Ridge, mine seems pretty tough, and does great for the type camping we do which is mostly off the beaten path no hookup type stuff.