I've not tried the Adams waxes or polishes but have tried and like their car shampoo, detail spray, all purpose cleaner, tire shine, and carpet cleaner.
But for waxes, Zaino is the best I've every tried. While my G8 is not a daily driver I do wash it quite often and it still beads like it did the day I last Zaino'd it and that was over a year and a half ago. Everything else I've ever tried seemed to wash off after a couple washes, so I'm very impressed with Zaino.
So as Willy said, if someone has tried both and can tell me that the Adams sticks to the paint like Zaino, I'd like to hear about it and know which Adams wax does it.