Review on Gulrear Portable AC Window Seal Kit - White 400CM/158Inch Hot Air Stop Exchange Guards With Zipper And Adhesive Fastener by Justin Coatsworth

I was just about to drop $400 on a custom window insert when my wife discovered this product. At $20, this is a no brainer for casement windows.The good: works like a charm. Pretty easy to install. Keeps out bugs way better than I thought. Fairly fast to take the AC unit hose out, and when done right, this still allows the window to close when you take the ac unit out. On my window we can even unzip the seal and put the screen back in for nights that are cool and we don't need AC!Be aware: The seal fabric doesn't muffle noise much, but you probably won't be able to hear the outdoors over your AC unit anyway. The stick on the velcro is okay, but it has come off a little bit for us--you could consider nailing the velcro to the window with small nails and leaving the velcro but taking the fabric in during the winter.Real concerns: security; if you're on the ground floor, a person could easily unzip the seal, reach in and open the window, and climb into your house. I live in the country so I don't have issues using this at night, but I bring in the AC hose and close the window when I'm away during the day. I would think twice about using this on the ground floor in a city.