It's good, but has potential to be better.
Pros: The detailing on the armor suit and jet pack are great, and I think the simple colouring works well for the picture. The blues of the suit go well with orange mist, but I may just have a slight bias towards the blue-orange colour scheme--it's my favorite.
Cons: The poise of the soldier made it difficult for me to initially make out what the figure actually was. This could be amended with a tiny addition of detail--a sillouette of the soldier's face in the visor, or his right somewhat peeking out from behind his body--anything like that would help give a humanoid shape away. Perhaps if the feet were more visible, it would be clear, but you seem to want them obscured by the orange fog, so perhaps not.
Advice(aka my own unprecedented personal opinion): One way to clear up some of the detail on the armor would be to have the fog set a little lower at his feet, rather than all the way near his shoulders. If you put effort into detailing the suit, don't cover it up!
I can't think of anything more to nitpick. Good job, and I hope this review was helpful. If not, there's that ever-so-useful red button to the lower left.