I was wondering the same thing. It looks like it might work well if you car is just lightly dirty, like has pollen or dust on it. I highly doubt that it'll take off bugs and other nasty stuff.
The only thing mr clean does is filter the water to remove impurities. So buy a filter, the rest of the mr clean gun is for shooting soap and such. so all you need is a filter on the end of your hose.
That's all you need. Costs about the same, but lasts for a couple years...or more if you take care of it. When I'm at the car was, I just whip that out, and get my car dry in about 2 minutes, while the guy that got out of the stall before me is still only halfway done drying.
The best way to sell a product in america is to make americans lazier, if u notice many new products do just that, like this auto wash, and like that new vacuum that runs on its own
i have the mr. clean wash thing and its actually good the only thing is when drying it you have to carefully make sure u put the mist over every spot if not ull get spots.