Never really gave this one much thought, although you're right, I see it just about everywhere. I've pretty much been using P&S Brake Buster since it was introduced, and before that it was Eagle One Wheel and Tire Cleaner. I think I'll grab this next time I'm at Walmart as it seems to be a good product to have on hand for occasional use. I would have grabbed that Koch Chemie wheel cleaner when I was at that detailing store on Saturday as they carry their products, but I wasn't sure what was good from their lineup. I'll have to remember to grab a bottle next time I go there.
Koch Chemie Magic Wheel cleaner is really good. As good as Meguairs. The brakebuster is for both wheels and tires. The eagle one stuff is also no joke.