We moved into a condo with a sliding glass door from the early 80's. You could barely open the door more than an inch before you had to pretty much pick it up. Design Windows and Doors gave us an amazing deal, matching a quote from a different company but with a better door. The day of our appointment, they came in, took out the old door, frame and everything and installed the new door in less than 3 hours total! The entire process was simple, they explained everything to us as they went and made sure we were never kept in the dark. The end result is so great we feel like we have a new and much cooler home. I highly recommend this company. Everyone we've talked to or who has visited our home has been extremely nice and helpful. 10/10 would recommend.