I really love this piece. The colors are really brilliant and I love the lighting effects you've done on this one.
But uh...I don't want this to sound mean or anything but the position of Koba's hands doesn't look possible. I don't think many human beings are capable of letting their hands fall that way naturally (I tried to do it after seeing this pic but I can't move my pinky out. O_o)
This is really really cool! One thing I think though that should be fixed is the purple lighting. On the front figure it is applied all over the body instead of a certain spot to give definition and it kinda flattens it out. But I love it!