Flawless product, good quality mechanism and screen, easy installation. You will need to make holes in the guides (where it fits) but it has a special plastic attachment to easily drill. If the standard dimensions don't suit you and if you like "DIY projects", converting it is a matter of an hour (cutting aluminum, mechanism, and screen). I bought the 160x60cm one and brought it down to 140x42cm.
Definitely a value for money product, I will buy again for other windows.

It's worth it with 1000. Initially, it requires very good measurements of the window, but with the tests, it will fit perfectly on every window. I have a saw and I made the cuts in 5 minutes.

Very difficult to prepare the net, until it is finally placed on the window. It took many hours and you need to have many tools in order to cut the net to the desired size.