I was thrilled with the work that Quantum did for us. Our doors were installed on schedule, work was done professionally and installers were a pleasure to work with. In addition to our two new doors, one of the crew caulked an existing window for us at no extra charge. Alex followed up after installation to make sure we were satisfied, and we were! I wouldn't hesitate to recommend Quantum to anyone who needs a new window or door, and I will certainly use them again in the future.