We received & installed the inserts. Today the neighbor behind and 1 house west of us is working outside with music blaring. Using a phone app decibel meter, I had just over 50% noise reduction. The real test will be this weekend. ATT Stadium (where Cowboys play) is having a parking lot concert. In the past we've been able to understand what the announcer was saying. We have an 100+ year old farm house so the windows are drafty but they are also thicker and wavy & I was reluctant to give up the authenticity. We tried another brand of inserts, but in the back room they were failing after a couple years. I found Indow this time around and learned they are the original. There's simply no comparison between the 2 products. Indow are more time consuming to install than what we had, but the quality, appearance and performance is many times superior. From the 1st phone call to receiving the measuring kit, returning it, submitting the measurements & getting them reviewed/approved, manufacture, shipping & receipt took just under 3 weeks.