Well, JW, Superman/Doomsday was interesting, to say the least.
Doomsday himself was protrayed very accurately--namely, a pure, cold-blooded killing machine. I take my hat off to the producer in that regard.
Kal-El was done very well too, but they could've drawn him a little less chiseled. It made him look more 50's ish or Roger Kirby like.
I really liked what they did with the Luthor character. Brilliant, yet psychotic. What he did to Mercy was an unexpected, but refreshing twist.
Both Lane's and Martha Kent's characters were a bit subdued for my tastes.
Olsen, Perry and the rest were okay to borderline.
The action was first-rate. Heck, it was light years ahead of Superman Returns in my opinion. Superman hadn't flexed his muscles that well on video since the final episode of JLU in Destroyer.
Overall, I enjoyed the direction the movie took, but it did get away from the classic story. Superman vs. Doomsday was too short a fight for my tastes. The absence of other heroes from the original story was a huge departure which I didn't like, but it was done well enough. Finally, the death scene was done far better in the book itself.
All in all, I'll give the movie a solid B-.