Although I'm used electronics, mechanics fully required in the area, the installation of the insect screen was even for me a new challenge. The assembly instructions required constant thinking along u. Even 1 year ago, but I remember at min. 1 mistake in this. I was just the aluminum rails in the length shortened, the Plisee I've not changed. Even a dry construction on the floor I've made. The installation I have a whole weekend dedicated to u. Which you also need. Once installed properly, it works then, but it is really ridiculous that any seller a reviewer property for a similar product to about 70,000 Spare sued. I for assembly instructions only 0 star left, I will now also being sued?