This stuff is fantastic, at least for one of its two purported uses. The first is for cleaning, and unfortunately this is not the best glass cleaner around. I suppose you could use it for fingerprints and light soils, but not for anything else, especially hard water stains. The second use, which is to allow water to slide off, is very well realized. The effect can be seen starting around 40mph, depending on the rake angle of the windshield, and increases with speed.
The other nice thing about this product is the ease with which it is applied. To apply, I simply grab a crappy MF, spritz the product into the towel until wet (slightly more so than what you would call damp) and then just wipe it all over the glass, ignoring the haze that forms. I then wait for a few minutes and then wipe off the haze with a MF with a moderate or deep nap. Done.
EDIT: Forgot to mention that my last application was over a month ago and it's still working great.
The other nice thing about this product is the ease with which it is applied. To apply, I simply grab a crappy MF, spritz the product into the towel until wet (slightly more so than what you would call damp) and then just wipe it all over the glass, ignoring the haze that forms. I then wait for a few minutes and then wipe off the haze with a MF with a moderate or deep nap. Done.
EDIT: Forgot to mention that my last application was over a month ago and it's still working great.
