I like going to Olsons when I want a good car cleaning. They have three different packages to choose from - all being under $20. I'm always satisfied with the level of cleaning they do - though sometimes its not perfectly spotless (they are in high demand so occasionally they'll miss some dust..), it's worth the money & time.

I would have to spend at least a couple of hours to clean my car in order to get it to the level of cleanliness that they do in only a matter of 20 minutes or so.

They are reasonably priced, don't try to sell you extra services, consistant.