I used Crystal Glass to replace a picture window where the seal failed. I had a few seals failed before and used the manufacture put it took from 2 months to half a year to get the work done. I measured the glass size myself ordered the window with low E and argon gas and eight days later I had a new window installed. I got a day when they could come out plus I got a phone the day of installation letting me now that everything was a go. The service, install and quality of the window I'm all happy with.