I've had my window inserts for about 8 months now and I decided to write a review. I can not recommend this company enough. I live ON the train tracks at a crossing where the train beeps the horn 4 times every single time one passes which occurs throughout the night. Before my window inserts I was waking up to each and every train that came by blaring the horn. Now I never wake up! They are super easy to install once you get the hang of pushing in the rubber sides. My roommate thought I was crazy for purchasing these since we just rent an apartment but, sleep is important and these really do reduce the noise at least 40%! I notice a huge difference when taking them out even with my window closed. The team is great, I worked with two separate people and they even stayed on the phone with us the whole time during the laser measurement process to make sure it was done correctly.