Here's another thread that asked this question: http://www.detailcity.com/forums/showthread.php?t=6772
As I said in that thread, not bad, but it didn't blow me away. Really poor durability, the few times I tried it. Fills in very light marring. I would probably say it's overpriced, if you don't get the rebate, but a nice "all-in-one" kit (applicator, MF cloth and wax). MF isn't the ultimate, but it's better than the old towels/shirts (buttons still attached ) that I've seen some people using.