Do you have crazy biting chickens? Chickens won't bite through netting, but everything else with fur and teeth will tear right through it, so don't trust it for any kind of predator protection.
I agree, it will keep chickens in but won't keep anything else out. I do use it on the tops of some of our temporary runs, but wouldn't think of using it on anything else. The temporary runs I just use it to keep hawks & owls out.
Thats what I have always used on the top of my chicken pens. My biggest problems with it is in the winter. The netting is just small enough to allow the snow to build up on it. Once the weight builds up the netting either rips or stretches to the ground...what a mess!!!!!
I covered my runs with the plastic stuff to deter hawks from swooping in for a quick lunch. That has worked well and kept the chickens from getting out but here in S Ga the sun has deteriorated the plastic in less than two years. It is now so brittle it is falling to pieces. I won't buy this stuff again.