i bought a house last fall that had terrible windows in it. cracked, some rot. fogged up. i have some experience with windows, 20+ years working at a window factory. much of that in the factory. so i needed 4 large, 3 smaller and 1 patio door. i think the wait time was 5 weeks, not bad. install was 2 days, quite impressive, good installers. i think the window did great for winter and holding the heat out now. i would recommend the product and the company