I bought this for two sidelights on the front of my house. I originally had sheers over them, but it was too easy to see inside the house, especially at night.  I purchased this to apply to the sidelights and then put my sheers up. On its own, it does mute things, but I feel safer with the sheers on top of it. All said and done, I love it this way and bought more to put on my back door.