We had ten double sash windows that needed work and had not been happy with how the people we had come to look at them talked about fixing them. They really didn't have a clue. Then I was able to track Greg down and it was just brilliant. Someone who really knows what they are doing and Greg does all his work so professionally well. We have ten perfectly working double hung sash windows again that will be right for decades and Greg even fixed another non sash window for us easily, Greg really knows his windows and I have no hesitation in recommending him for any windows that need someone who "really knows what they are doing" to fix them or renovate them. Brilliant service and a very lovely man.