XOTek did an outstanding job in installing my replacement windows. They performed with excellence in all phases of the project from the initial sales presentation to the final completion of the installation, including follow-up. The sales presentation was very thorough and provided me with an excellent understanding of the details of replacement windows, so that I was able to better understand what to look for as I was doing my research, etc. He encouraged me to get multiple quotes so that I would be more knowledgeable about the window replacement availabilities and companies, and be able to make a more informed decision. The office administrative staff was very knowledgeable and friendly. The installation crew was very thorough and meticulous in doing the job. Three different persons came out to measure the windows on three separate occasions. The person who did the installation was a marvel to observe. He was very detailed conscious and very persistent to insure that the work was exactly as he wanted it. The crew cleaned up the work area, so that when they were gone, it was very clean without any residual mess. There was one minor flaw in the window mechanism, and they came out immediately to correct the issue. The windows are great – the replacement windows are made by Amerimax Building Products, Inc. After doing my research, I believe that they are the best you can find in my area. I give XOTek a full 5 star rating without any reservations. I fully recommend XOTek to anyone who is looking for someone to replace the windows in their home.