IMHO What makes these shoes so attractive is the color combination going from Heel-Toe: Grey > Light Grey > Black.

I don't know what it is about that color combination, in that order but it's spot on. As a matter of fact, I would by this color combination on any other shoe. It's too bad, this shoe is the only one I've come across. Perhaps the last one I'll ever find?

The replacement shoe fails to achieve this secret ingredient, and my hard earned cash.