They replaced 2 sliding glass patio doors and 5 large plate glass windows. This was the last of several replacement jobs that they began in the summer of 2010 as we proceeded around the house, one room at a time, as our budget allowed. In every case, all steps, answers, surveys, quotes, measuring, scheduling, installations, products, cleanups, follow-ups, and warranty services, were of the highest quality and done professionally and courteously. They prove the old axiom, "High Quality doesn't cost; it pays!"