I have a large picture window in my living room that faces a very busy street. The insert has helped reduce the noise and I'm optimistic it will also help insulate the room when the weather turns cold. When I measured to order the insert, I didn't know that I had to consider space to accommodate opening the louvers of my four plantation shutters with the insert in place. Sadly, I can now only open the two middle panels of shutters unless I pull the shutters away from the insert because the side panels bump into the insert and don't have enough room to open. An Indow tech tried to help, but there wasn't a good solution. I may order new shutters with smaller louvers.