I will have those sneakers...even if they'd only be a male item. They're awesome.
With that said, the shape of the (our) left shoe looks a bit wonky at the tip of the toe. It's too squared off. That'd be a simple adjustment of a few pixels brought down a pixel or too. But the shape, besides that, looks awesome. I love the shape of the shoe facing towards us (our right).
I think the checkers of the shoes would "mellow" out with more shading of the shoe. If that doesn't seem to work, I'd try maybe adding a mid-tone of the light and dark colors around the dark squares. That'll help the two colors blend together, but still keep the checkered pattern. :)