This is a company that stand behind their products and installation.
We have them installed our windows about 10 years ago. Last week, my wife tilted the window for a cleaning and could not close. She asked me to check without telling me what she has done. Naturally, I tilted the window one more time. Then I heard a cable snapped. After watching youtube video, I realized that both tension cords have snapped. The window was inoperable and we can't tilt it anymore. I gave them a call and they setup appointment immediately. A window tech came and fixed it in less than half hour. We have been very happy with the windows and this last experience made it even better. We'll definitely call them if we ever need windows replacement again.
Thanks WoW !!