They back up everything that they say. Overall do great quality work and are happy to help and answer questions. We were impressed by the tremendous difference in the new windows. Our old windows made winters unbearable.  We can also say that the company definitely stands behind what they do. The quality of work speaks for itself. We have not had any issues with our new windows. We would also like to recognize the salesman and crew leader for their exceptional service. – Raymond & Laura Bednarz, New Hartford, NY