To tell you the truth I think it was a bit pants!
I think that by the end I was hoping for Superman to die. I do love blockbusters but i'm struggling to remember the last good one. To compare it to Spiderman, you really care about what happens to Peter Parker and you hope he gets the girl but in Superman you'd be happy to see all the characters die a la reservoir dogs!
In short, it's too long, not enough action and the characters have no personality.