Well, I have the ZG touring version, and it did raise the airflow a few inches, but still not over my head (I'm 5'9"). I do not find it to be flimsey at all, however, it did squeak excessively, which I solved by simply applying a bead of clear silicone sealer all around the inside flange of the windshield. Not a peep since then.
Anyway, I plan to finish off my shield with one of these >>>
Check out their site for various fixes. You'll get the air bubble you're trying to create.
http://www.saeng.com/default.htmOh, here's how the ZG looks on >>>