I just got done with a 2500 mile road trip using the Kuryakyn bezel and as I posted it cut the glare by about 90 percent, leaving just a very thin band of light that didn't bother me at all.
Of course, your result would also depend on your height in the saddle. Fwiw, I'm 5'7" with a 30" inseam, and am using a Sunray saddle.