Nice but not brilliant. The half and half sky to land ratio doesn't sit to well with me. I would have preferred either a lot more of the dramatic sky or something in the foreground and less sky. As it is it feels neither one nor the other.
Nice complementary colors. Overall, a pleasant image. I wonder if you adjusted levels or curves, what that might do to enrich the tones a bit? Hmmmm... just thinking out loud. The sky is great - my favorite aspect of this shot.