I think it might have been really interesting if the label of the can were completely obscured or in shadow. Its just a tiny bit distracting. Otherwise, the focus is drawn well to the subject. I like the composition. The exposure is good.
Hey, I wouldn't be using that opener, looks a little rusty ;-) Great shot, love the lighting on this shot. Only thing I would change is the label, I have a feeling it might have looked a little better without the Beef label. Still, excellent work.
That piece of metal is just gross looking! It would be hard to choke down the meal that it opened. Great low tech choice, no interpretation needed. The framing and crop is fine as is the DOF, but the subjects have a turn off factor that rivals the message. You should take a Dremel or Brillo, clean up the can opener, peel the label off the can and reshoot a black and white with maximum impact. Very high marks for challenge interpretation and composition, some deduction for subject that makes me want to wash dishes.
I really think you captured the spirit of the challenge. Gorgeous shot with nice details as well. Can't wait to see what lens you used for this. well done!