Brock Doors and Windows replaced all the windows on the upper floor of our house in 2016, and several more windows plus our patio door this month. Our sales representative, Sandy, was friendly and knowledgeable, and able to answer all of our technical questions about the window specifications. He gave us his recommendations with no hard sell, and with attentiveness to our ideas. The installer in 2016, Eugene, worked efficiently and with great care about details; I have never seen such a neat caulking job! He faced a bit of a challenge installing one of the windows, which was situated above a pergola covered with a large wisteria vine, but he managed with ingenuity to get around that problem. The installation team for this year, led by Matt, also worked competently and efficiently. They too faced some challenges, in this case removing three basement windows which had been over-firmly attached to the interior walls. They went the extra mile to ensure that all was tidy and secure, putting in several hours of additional work on a second day. We are very pleased with Brock, and would highly recommend the company.