I purchased acoustic grade window inserts to help with the absurd levels of noise pollution in my neighborhood. While the noise is still audible, it has been reduced enough that I can hear my computer, phone, and thoughts again. While it may not be as effective as increasing the distance between myself and the source of noise by several zip codes, it makes it so that I am at least able to ignore what noise does come in rather than feel it buzzing in my ears as I'm trying to sleep. I believe Indow has improved my quality of life in my home compared to before I used their product. The insert does what it is supposed to do.