I bought the system. didn't make my white microfiber towel green at all. and when it dried I had no spots at all. except on the windows. they're still there even though I windexed em twice. Oh well. Overall if you're lazy and you don't care that much about the wax or whatever. go for it.
Since I don't really give a damn anyway and I'm getting my car painted sometime soon... I use it and I don't care. I'm gonna wash my dad's car with it this weekend and see how that works out.