We had one and after using it a couple of times, it ended up in a pile at the back of the shed until I threw it away.
Too much trouble pulling it on and off. Really took two people and one of us had to be on the roof. ...it's a struggle and then you have to be very careful that you don't damage antennas and gutter extensions, etc. It also caused some abrasion on the roof corners due to wind flapping it around.
Our experience only...others will certainly have valid opinions and more positive experiences.