Thank you for the indow. The sound reduction is perfect. It helps to keep the summer heat out and I hope also the winter cold. Best of all you can't see it. The whole process from beginning to end was easy. The only issue, of I may, was the laser. When I was measuring to the right it was easy but to the left it was harder to keep the laser steady when I went to push the button it would tip I think because the laser needs a support on both sides of the magnet.