Just finally got around to seeing it in 2D in a cinema two fucking hours away, spoilers ahoy (i.e. don't read if you haven't seen the film and intend to)...
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The way the story jumps around between flashbacks is a little jarring, and very Nolan-like (Batman Begins says hi), but most of the flashbacks actually do relate closely to things that have just happened in the story (as they did in Batman Begins), and it works very well.
Henry Cavill makes for a great Superman. I only saw it in German, so I can't speak for his accent or vocal performance, but the physicality of it he's mastered beyond a shadow of a doubt.
Zod was an awesome villain, and well beyond Terence Stamp's portrayal in 1980. That's not to diss Terence Stamp's cult "kneel before Zod"; but let's face it - it's too camp to be taken seriously nowadays. Man of Steel's Zod is the quintessential racial supremacist - unswervingly loyal to his cause and his race, and uncompromisingly unhinged when his plans turn to shit.
Those who said that the film was completely humourless were wrong - there is a handful of decent gags in there, with the satellite one being particularly hilarious.
Colonel Hardy is one of those characters who seems quite unassuming at first, but has some awesome scenes and a great send-off.
Faora is one bad motherfucker, but contrary to all this business with the objectivisation of women in film nowadays, she basically seems to be a male warrior with tits. Ayelet Zurer's portrayal of Lara - however brief - served the idea of a strong female character much better (by the way, Faora was portrayed by German actress Antje Traue, and from what I could tell, she did her own dub).
Contrary to apparently popular opinion, I loved the ending. Many people have been arguing that Superman ALWAYS finds a solution without killing anyone. Of course he does - he rotates the earth backwards to turn back time, kisses Lois Lane to make her forget her knowledge of Clark's real identity, and rebuilds the Great Wall of China by looking at it. Past Superman films have never really presented Superman with a real moral dilemma (in fact, pre-Crisis books never did either) and have taken cheap ways out of solving such dilemmas. Man of Steel was the first film to actually present Superman with two evils, force him to choose the lesser evil, and live with its consequences.
Negatives?
Lois Lane is kinda bland. It's good to see her acting with a bit of initative as opposed to being "rescue me" Superman bait, but she seems to be devoid of any real personality.
The tornado scene was just fucking ridiculous and portrayed Jonathan Kent more as a domineering patriarch than as a role model. It didn't help that Martha Kent seems to be shying away like some battered wife in every scene.
The editing was a little too quick for my taste. It's been reported that there will be an extended edition (the cinema edition is Zack Synder's director's cut) so I'm curious to see if that will handle pacing matters a little better. The film could have certainly devoted more time to building up a relationship between Zod and Superman, and more time to building up the relationship between Clark and Pa Kent. Some background to the oil rig scene wouldn't have gone amiss either.