First off...Pandemic. I get it. The measurement process was horrific. I got my indow over a year after ordering only to find that after installing it, I'd get about a 3.5 dB reduction in mid to high frequencies with the only window in the room. Ambient noise is diminished a bit but was it worth $500? Hardly. $100 ? perhaps. The wait time is excusable, the communication between my sales rep and I after numerous emails, and him never getting back to me after being quick to sell the product? inexcusable. I'm sitting here really missing that $500