Pay attention to shape also. We have a very nicely contoured one on a razor. Only complaint is that it funnels water straight to driver and passenger's crotches.
Another thought there is with the factory glass on mine which is contoured, if it cracks/breaks it's a whole new windshield/frame etc. With some aftermarket windshields that are flat vs contoured, local glass shops can replace glass for much less than a new windshield/frame.
