I have a 2 yr old house that has double pane widows, my house has a great of the city skyline the downside is I hear cars and trucks 24/7 from a freeway that is two blocks from my house. I started looking at indow's about a year ago and I was pretty skeptical about how much noise reduction it would really cut. I decided to just buy three indows for my master bedroom and take a gamble. Indows far exceed my exceptions. They arrived on time and were packed really well. They were easy to install and the noise reduction, i say is close to 90%. I know longer hear the trucks or cars. They are worth the price.