A Review - (no spoilers)
If you are a fan of the comic, you may like this movie.
I didn't like either. The fault lies mainly in Grant Morrison's original source material, which I thought was over-rated. Also because of the episodic nature of the comic, the story is not one easily translates into a film. Plot twists come out of nowhere and are usually addressed by a few lines of exposition. The inclusion of secondary antagonists is distracting and adds nothing to the overall story. The result is a movie that feels rushed and loses all sense of urgency.
The film's troubles are further exasperated by the overall flat voice acting. Superman in particuarly was wooden without a trace of emotion. Lois Lane is not much better. However, Anthony Lapagla was good as Luthor. To be fair to the actors the problem lies with the source material. At no time does the script ask Superman to convey the emotions that someone in his position surely would be feeling.
Overall this the weakest entry of the DC Animated Movies, (which for the most part I have loved). I admire that the producers are willing to take chances with source material that is unconventional to a mainstream audience, but this simply wasn't the right story to tell. My suggestion for a movie adaptation would be John Bryne's vastly superior, Man of Steel.
Again, if you liked the source material, you may like this movie. If you didn't like it or havnr't read it, you will likely find the movie confusing. boring and incomplete.