I've used the Scrubbing Bubbles one and don't like it. I was attracted to it by the idea of flushing the cleaning head. As someone else pointed out it is soft and not condusive to scrubbing.
May have to try the Chlorox one now that a few others have indicated they like it. They do appear more substantial and I think you throw away the cleaning head. Right?
I just hate having that nasty ol' brush sitting in the corner so I'm definitely looking for an alternative.