These guys are great. They call to confirm the appointment and they show up on time. The two guys who did the installation were friendly, efficient and definitely knew what they were doing. I’ve had other windows installed in my home and Window Source either has the better windows or better installation for just about the same price. I have a large house and am updating one floor at a time: it’s the second time I’ve contracted with them and will do it again. Next time I’ll place my order well in advance since it can take a bit of time for the windows to be delivered, but still worth the wait. The windows look great inside and out!