My roommate picked up a tub of these, from Target. I forget how much he said they were, but it wasn't expensive in the least. I have some annoying break outs, particularly on my forehead, so I decided to try them out.
They definitely removed a good quantity of dirt and oil, and they didn't dry out my skin like some other acne cleansers have done. And, it felt really great and 'clean' when I was finished cleaning my face. That said, I didn't notice a drastic reduction in my break outs, so this isn't a miracle worker. Still, I most definitely felt cleaner, I saw the dirt that was removed from my face, and I can say that it does help reduce acne eventually, with regular use.
So, not a miracle in a jar, but definitely helpful with regular use, and very easy to apply.