I think there should've been more focus on the shoe which doesn't stand out enough. It follows the line and the color of the sleeve, merges with it and becomes "invisible" at one point. For a second I thought that this was a weird handshake.
Just be careful about what shoes you use if you make them more of the focal point as some designers are picky about copyright. For example, I think Louboutin even has a trademark registration on the red color on the soles of his shoes. Just something to keep in mind :)
Quoted Message: bad lighting (good for art photography but not for stock)
I'm afraid I have to agree. It is extremely side lit. This is great for adding drama, but unfortunately highlights every little flaw. For example, it exaggerates a very pronounced vein on the woman's foot. A strong fill light on the right hand side would have made that vein practically invisible.
Sorry to be critical, but this is a learning process :)