The material is very easy
The material is very easy to use. The only catch is that you need the right tools (like a very fine-toothed saw) to cut the aluminum, and you need to hold the aluminum frame pieces just right: Firmly enough that they don't move around, and you get a straight cut, but not too tightly, because the aluminum bends very easily. I was able to put new bug screens on a few windows so far, and when I have time, I'll deal with a few more.
Everything went as expected, I'm happy with the purchase.