I was so excited to get my noise reduction indow windows. We have a freight train that runs behind our house. After waiting 3 1/2 months we finally got our windows. They were delivered without any issues. We followed the installation instructions. All the windows fit like they should, except for one, the most important one, our BEDROOM! That insert seemed a little off. It did not fit as snug as the rest. After a month with the windows, we find that the train noise is muffled. By no means is the noise totally cancelled out. At first I was disappointed, there’s really not much we can do at this point. It is what it is. At least I’m not being woken up by the train at night. I can now hear the TV when a train goes by. So I guess the windows are doing the best they can for our situation. I won’t know how much energy we are saving yet. We live in Florida. Next summer will be telling.