Not bad, though it looks like your relying on the smooth Mesh feature to make or brake your model.

All of the armor pieces seem to have been basically blocked out, and then had the SMP applied to smooth them out, and your just pulling verts out until they form a crease.

You should really build up a good solid base mesh, and bevel edges, and construct a SOLID mesh this way... then apply a smooth if the need be. This may take allot longer, and will require some planing.

Get some concepts drawn, and set your mind to work on a design, and develop this design in 3D.

Your results could improve tenfold.

What you have is looking good though!