I run the MRA screen on my naked CTX and it's fine and all but pretty much directs air right to my upper chest/face area. Since I wear a full face helmet it doesn't bother me, but on the rare occasion where I can be found without my full face- the wind is noticeable.
Not any worse than without a screen at all. Much less wind on my chest, but it doesn't do much above about my neck-line. Without my full face helmet, I really notice the wind. My helmet visor is certainly a graveyard for bugs, so my face is still plowing thru the air.
I wasn't impressed with the taller 'touring' type windscreens. They look fine on the fairing version of the CTX but look out of place on the narrow front end of the naked. Likewise, the standard 'double bubble' screen found on most sport bikes look nice, but have almost no effect (unless you are in full tuck) on the wind hitting your chest and face. The MRA is a decent middle ground, but leans toward the sport bike sized windscreen in terms of protection. Better than nothing, but also not on par with tall screens for raw protection.
Just seems like an expensive option compared to others on the market. However, I have zero complaints with mine. It went on in a few minutes and has stayed rock solid since installation.