The Indow inserts have reduced street noise, since installed, there is no audible white noise, sirens are heard muffled or as if distant, vehicles that turn sirens right below the building are heard but the decibel level does not startle, same for truck reverse alarms nearby. The echos of street sounds are also reduced considerably, for example, three blocks away sounds like sirens and motorcycles are barely audible. Black trimming makes the inserts look as if part of the original window. The outer tape in window 2 was not entirely sealing on both sides, but within days and after adjusting to the prevailing temperature, molded themselves to the irregular wall. It took longer than expected to install as I was unaware these came with a safety chain and by chance I had a drill handy. I believe the safety chain aspect needs to be mentioned early on to customers, and shown on product videos, it was an entire surprise to me and had I not borrowed a drill the previous week for other purposes, I would not have been able to install "out of the box" as I thought could be done or as it seemed on the installation videos.