I have tried it. Before it even came to market, I had the chance to test it. I can personally say that I do not like it.
I will tell you first what I did like about it.... When you drop it, you can just rinse it off rather than tossing it in the can. It also did a decent job at removing the contaminates.
Now to why I did not like it..... It felt as if it were scratching the paint when "claying". You have to wash it off several times during each panel to make sure you remove the contaminates from the block. If you do not, the contaminates will have no where to go, but to rub back and forth on the paint. Thus leaving fine scratches.
This is just my opinion though, so please, do not let it sway you away from a purchase. Your best bet is to try it and let your own experience decide for you.