I am really enjoying my Indow Windows. I live on a busy street and always have a lot of noise from street and foot traffic as well as construction. I live in an old building so my windows are old and thin and poorly insulated. I got the acoustic grade as I wanted to cut out sound as well as cold. The noise reduction is pretty good. I still get a lot of noise, but it's dampened which makes it a lot more tolerable. Things like construction and fire trucks are no longer the jarring experiences they were and are now just background noise. The warmth seems to be staying in better too and it feels as though I need to run my heater less. If I had to purchase them again, I definitely would.