The Windvest does a good job of keeping you in your seat. It is in no way like a full wind screen on a dresser... I chose it because it still lets the bike look like a "SPORT" bike. The lines of the Windvest are pretty sleek also.
The one in the picture is a 16". It has a really nice chromed mounting bracket, That clamps to the handlebars... once mounted it is very rigid.
The only small draw back is that there is only one adjustment hole in the screen itself. If there was one more to take it higher, by an inch it would be better.
I'm 5'9" @ 200 and I can see over the top of the screen just fine, which is the way I like it.