I used it for a while and I liked it a bit better than stock. I'm 5'6" and have a low seat. I then went to the MetalMule / Powerbronze screen which was better. Then I did the Madstad robobracket thing which was better. Then I did the Desierto 3 which was best and of course stupid expensive.
The clip on is an affordable way to do an 'adjustable' screen from stock. And, if you've got the right height and helmet combo it might work for you.