I'd say it's fairly decent for what appears to be your first LDD Mech - reminds me somewhat of the mechs I used to build w/ LEGO Creator (a really old-school 3D LEGO program). Anyway, I think you should add something to the top of the cockpit to make it more interesting than just being flat, an possibly a bit more detail to the guns. I also recommend that you try the ldraw group of 3D LEGO software - it's free, and you can find it here:
http://www.ldraw.org/ BTW, thanks for adding me as a favorite builder. :)
