Wasn't bad...wasn't great, so I was a bit disappointed - but I still enjoyed the movie.
I can't blame anyone for it being what it was - I think the noble Super Hero type that Superman is prevents any writer/director from showing a dark, more interesting side of Superman like we saw in "Batman Begins".
So given what they had to work with - pretty good Superman movie. Nice touch using Brando, Kevin Spacey did a great job, and there were some interesting devlopments.
Nowhere near as good as teh X-Men or Spiderman movies though. I think maybe society has just had its fill of Superman.