I like that these came in a sealed package. It's much easier to install than I thought it would be. Just open the back door and put the Velcro tabs along the frame. The shade then attaches to the Velcro. You can take it down whenever you want. I like that I can still roll the window down to let fresh air in. More important, the grandbabies aren't sweating from the hot sunlight coming in. I like this product. Easy to install and easy to use.