Nice. It's a convincing design, and the lighting is very controlled and confident. I like the little guy doing an EVA over the propellant tanks. Gives it a sense of scale.
If it was my picture I might try changing the colour of some of the lights on the ship, though - using red lights on the ship itself gives you a more restrained palette overall, which is cool, but it does make the picture a little confusing in parts as to what is light from sources on-board the ship and what's light from Mars itself. Blue or green running lights on the ship might look nice.