it is really good, and I can tell you worked for a long time on this piece, but....( I feel bad for saying anything here) the right hand doesn't look quite complete... its kinda the frontal of the picture as a whole and it's the only thing that isn't metallic looking, also the arm looks a little small (and just being picky here, but the metal piece right next to the right hand, is just a basic gradient and sticks out abit)

looks good to me, what was it done in illustator or flash?