Nice and clean - well done - although he`s a lot skinner than the concept, think it needs more mass. You Uv`in in maya or zbrush ??? Only thing I would change is the angle of the arms now your done - because its low poly it`s some what better to cut them off and angle then down it might help rig/pose him and then rebuild were needed - but its up to you and your idea on a final pose.