I was so frustrated reading the installation instructions to find using duct tape as a recommendation. The foam pieces I received were different than those in the instructions as well and I had to cobble together pieces to make it work and then seal it with tape. The pressure fit with no flange to stop it from sliding through the window is unfortunate. I expected better for the price. The unit is relatively quiet and cools the room as expected. Just wish more attention had been paid to the design of the window kit. That said, I realize these are designed for different types of windows. Just hate putting tape on a brand new custom window.