Well, I'm pretty new here but, here it goes anyway. I've been a fan since Elantris came out. I loved that cover, that was what made me pick it up. I bought Mistborn because I liked Elantris, and the cover was very interesting.
I, now, have to say that, just as an explanation, I hate inaccuracies on book covers. So, there you have it.
First, I think the Grim Reaper should be an inquisitor or some other character that was actually in the book. Next, the crows should go, replace them with something else, arrows or some other projectile. Now, I was under the impression that the majority of a Mistborn's wanderings was at night, where's the night? Also, I think the mist should be a bit more defined. I agree with many of you said that the place should be more dirty. I don't know that this is really covered in the book but, I know in places that get a lot of snow the buildings have steeply pitched roofs, not flat most of the time, so that it will slid off and not accumulate, because if the load get to be too much the building will colapse unless you shovel it off often. Now, that one was just a little something from my own experience. I was also under the impression that the mistcloak was an actual cloak not a skirt. I should cover the entire body in my opinion. I think the face needs some work too. And last, I think the dagger in Vin's hand should at least look like obsidian or glass.
Now, some of the good. Although the color scheme doesn't really pop it seems to be fairly accurate to me. I also like the metal lines. I know they're supposed to be straight but this makes it much more visually appealing. I think, other than the reaper and the crows, that the more I look at it the more I like it. Just not for the cover of Mistborn.