We decided on Thebco to replace a garbage set of French patio doors that existed in our house when we bought it. After a thorough demonstration from our salesperson, we decided to proceed with a Preservation brand sliding patio door from Thebco, mainly because of it's material, construction, and insulation qualities. It took a few weeks for our door to be ordered, but received a call to schedule installation as soon as it landed. They were flexible, working toward my desired dates for the install. The installation crew (Marc and Scott) were top-notch, giving me a call that morning to confirm, and then showing up on time. As a homeowner, I'm interested in learning, but also didn't want to be a pest. They were very receptive to any questions, and friendly throughout the process. I noticed that they took every step seriously. With something as serious as a large door in my house, I was concerned that it would be sealed and installed properly. They were sure to carefully remove the existing door (which I had another use for) without damaging. They were familiar with the product, so assembly went smooth. They had to do a little retro-fitting, including work on the door header, and replacing a small piece of subfloor. When installing the door, they made sure to seal the sill properly, fill any gaps with insulation and caulk, and to trim the interior and exterior properly. For the exterior, they were sure to install flashing and trim pieces behind the siding for proper water/weatherproofing. The follow up on the white caulk left a clean finish. They even added a piece of cedar under the sill for use as a "kickplate" to add protection for my foundation's combed finish. They also were sure to fill any interior trim nail-holes with putty, and vacuum up after themselves. I believe Marc even cleaned the glass after removing the factory decals. Overall, they did a fantastic install. I have the peace of mind that it was done properly and will last years to come. I would recommend this install crew to anyone who wants to ensure it is done right. The investment was significant, so I went in with some high expectations. Marc and Scott delivered.