I used the Waterless on one car and the H2O Guard on another car. Wow. They're both amazing.
I washed my car today and then did the H2O Guard after. It completely eliminated the need to clean my glass afterwards. 100% spotless, no streaks. Super, super easy to use too. I absolutely love it.
Waterless, I won't use much on my car, but I did want to test it so I tried it on my mom's rather dirty car. Again, completely easy to use. Night and day difference with almost no effort. Adam's has me completely sold. I quickly realized today that I need to go with the gallon size for Wheel Cleaner though. Two cars and I used over 1/3 of my 16oz today.