I've been playing too much Infinity Blade. My first reaction: "holy crap, Isa fanart?!"
My ONLY complaints are that the background kind of clashes with the character, and her hair looks a bit rushed. Just a bit. Maybe a tad. Actually, her wrist on the left of the image looks bent at an unnatural angle, and it seems like a missed opportunity to not have the polearm slanted perpendicular to the line she creates with her body. But those are nitpicks.
I love it. I love the armor, but most of all I love the depth of the image and the contrasts between the darks and the lights.