We had several windows replaced, and a sliding glass door. We were assured several times before purchasing that the warranty is extensive and covers all manufacturing defects. It doesn't!
The double panes in our sliding door are not sealed properly, such that we now have mould growing between them. The installers who came out to check it agreed that it was a sealing defect. Nonetheless, Clera refuses to replace it and honour their warranty.
Before you purchase, be sure to understand that the warranty isn't worth anything. Very disappointed.