Davey,
I haven't really used 845. Why do you feel it's overrated?
Personally, it doesn't last nearly as long as some people here claim it does. It only lasts about a month and a half before the beading REALLY goes dead. It's a great wax but I don't buy into the hype that it lasts six months. My car is garaged and in the shade most of the time so the sun is not the cause of the premature wax failure.