Let me start by saying, if you have an old window AC unit like my ancient Panasonic 12,000 BTU, this Powrocket side panel kit is a lifesaver! My original side extensions were completely destroyed, and I had no idea replacement parts existed until I stumbled upon this product.

The installation was surprisingly easy once I got the measurements right (more on that later). The white panels blend seamlessly with my AC unit, looking just like original equipment. They provide excellent insulation - I've noticed my room stays cooler longer without the AC working as hard.

Now for the important warning: MEASURE TWICE, ORDER ONCE! Some reviewers didn't do this and had issues. I carefully measured my unit before purchasing and the fit was perfect. The kit comes with both left and right panels with frames - everything you need for a complete installation.

One minor complaint - when my package arrived, there were a couple small parts missing that attach the curtain to the frame. Nothing major, but worth checking your package contents immediately after delivery.

In daily use, these panels make a noticeable difference. They keep cool air in during summer while preventing hot air from sneaking in around the edges. For anyone with damaged or missing side panels on their window AC, this affordable solution works beautifully when properly measured.