Haven't tried the Rain-X. I think a thing of Rain-X would be equivalent to the total value of my vehicle, so I have to weigh it's importance, you know! Stupid, cheap-ass 16 yr-old Toyota, or stupid, cheap-ass 16-yr. old TOyota with a nice slick windshield!
I should do it, seeing as to how I live in Pittsburgh, and the life span of my wiper motors is in question . . .