Just read one brief and a little spoilery review of the film. It's from AICN so I take it with a grain of salt. Some clips:
"But as soon as the movie started, with its long drawn out shots, I was more comfortable"
"Overall, it’s gloriously flash and fun, bold and hallucinogenic, all the while having a touch of grit, grain and gravity."
" I think Henry Cavill is effective as Superman in this film. I don’t think anyone can beat the quirkiness of Reeve’s Clark Kent, his total cluelessness and all as well as his charm as Superman, but Cavil manages this side of the character well – a bit dark around the edges, and deep."
"‘Man of Steel’ does have an unhealthy message about hiding your true abilities to keep others happy, even if it’s better in the long run. It’s different to the usual stuff I’ve noticed surrounding Superman lore, which I can only claim involves the original five movies."
"I’m happy to say ‘Man of Steel’ is highly commendable."
There is a short comic book story written by Goyer where Superman flights to Tehran to stop the violence but his peaceful intervention is seen as a stab in the heart of US policy so he decides to renounce citizenship as "Truth, Justice..." motto isn't good enough anymore.