My set up currently is the MRA Variotouring screen with the Touratech adjustable bracket. Some observations:
1) You really don't notice the adjustable foil brackets on top of the Varioscreen.
2) The overall effect isn't bad. Not a Goldwing, but very nice.
3) The black bottom of the Variotouring screen is a nice touch and probably shields the dash from any of the reported lensing and melting.
4) I wish there wasn't the hole cut out in the bottom of the Variotouring screen (as compared to the bottom tapered point of the OEM). I did adjust the position on the bracket to minimize the size of the hole against the back of the dash, and the blast of wind through that opening.
5) The Touratech bracket has been criticized for releasing at the nylon adjustment wheels. This did happen the first time I rode with it. I cranked them down and it didn't happen again. I still contacted Touratech and they ARE aware of the problem. They sent me their temporary solution (longer carriage bolts and outside nuts to hold the nylon wheels in place). They say that the "boys in Germany" are working on a more elegant solution. I received these and installed them and they work fine (although you know need a tool to adjust it, which defeats the purpose).
6) The GPS bar across the Touratech windshield bracket is very nice.