I bought the Indow window insert in hopes of reducing the volume of the neighbor's dog barking in my office when I was working. The sales person who I spoke with originally told me that he couldn't guarantee that the Indow window insert would help, but he said that he thought it might. I decided to go for it. Unfortunately, it does virtually nothing to reduce the volume of the dog barking or any other sound for that matter. In one sense, I can't hold this against the company because the sound is likely getting into my home through paths other than the window. However, I provide this review to warn anyone buying a window insert in order to reduce the volume that there is a strong possibility that it won't help. It's a lot of money to have spent on something that had virtually zero positive effect. Additionally, it seems to me that the price of these window inserts is high given their quality.