Wasn't sure which one you wanted.No it doesn't sheet with Rainx, it beads. I've got it on my side windows. Absolutely crap for windscreens IMHO. No arguments about the pros and cons of Rainx et al please. I wouldn't put it on my windscreen if you paid me to.
Personally I hate things like rainx but some customers love it.
Definitely nilglass for you, have a look at reviews it's impressive stuff.
I've had some right filthy screens come up lovely with it.