Awesome! great lines and just damn good art. The contrast between light and dark areas is effective and the symmetry of the piece shows the artists skill. The shading is excellent and I love the use of bold black lines to exaggerate different areas in the piece, great job. However there could have a use of the upper part of the canvas but it still adds to the effect so this is a minor flaw. Well done, great work looks awesome and I'm jealous of you're great skill.
so in summary... your art kicks ass... a lot of ass