Let me tell you, these foam panels have been a game-changer for my window AC unit. I was skeptical at first because my old plastic side panels never sealed properly, but these actually WORK.

The installation was surprisingly easy - just peel and stick the adhesive channels, then wedge the foam into place. I did have to trim about an inch off one panel to fit my particular window frame, but the foam cuts cleanly with scissors. Pro tip: save those cut-off pieces to plug any small gaps underneath your unit!

What impressed me most was the immediate difference in temperature control. My bedroom used to get random cold drafts around the AC, especially at night. Now it maintains consistent cooling without working overtime. The foam also dampens vibration noise - my AC sounds noticeably quieter.

After surviving both a brutal heat wave and heavy rainstorms, I can confirm these panels keep water out too. No more worrying about rain leaking through those side gaps! The material has held up well with no signs of deterioration.

While they're not the cheapest solution (I paid about $25 for the pair), they've saved me way more in energy bills already. Much better investment than constantly replacing those flimsy plastic panels that never fit right.