My wife and I recently had Greg Hartmann replace the original windows in our 1950s bungalow. We found him absolutely professional throughout the project. When he first visited he explained the various options, listened to our questions, and suggested what he thought would suit us. We chose and he ordered the new windows. When they arrived his crew installed them in a single day with little fuss and no mess. We are completely satisfied with the work. It was a pleasure dealing with Greg and with his installers.