These shades are beautiful and they were very easy to install. The installation doesn't require exact measuring because the brackets have an adjusting element that allows you to slide the shade for perfect centering on the window. They allow some light into the room but from the outside people cannot see into the room. I love that there are no strings on this shade and the shade's pull mechanism works great. I've had the shade for a few months and it works wonderfully. Highly recommend this shade!