Easy to install. One arm fell off the fence once so it needs to be well screwed in, but that was easily fixed.
This system keeps our cat away from the neighbours cats, who can still walk along the top of the fence as they used to but remain separated from our cat who has FIV.
Our cats go out side now, all of the time, When it's not raining🐈🐱.
Cats haven't escaped so far