In terms of the HDR technique, I guess it technically works. I don't care much for the photo itself though. I think its the way that the barn is sitting in the shot. Something wierd about it. Maybe its how its crooked, not sure. I think it would have been better if you had used a super wide lens and got a little closer to the barn to make it more imposing in the frame. You were at 28mm on a 5D. If you had like a 10-20mm that would have been perfect for this. I also don't care for the cluster of trees to the right of the barn and the piece of the random building to the left side. Using the wide angle and getting more in front of the barn and slightly more angled to the right may have yielded a better composition. Maybe I am just being nitpicky.
I guess as far as the HDR goes, atleast its not all super fried tone mapping like everyone seems to do.