Got to see it today, and quite liked it. Yeah, it's got problems. But it's got a lot of strengths, too.
I've come to the conclusion that if the problems of a movie throw me out of enjoying the movie while I'm watching it the first time, I won't like the movie. (Except sometimes for pacing issues - if the rest of the movie is strong enough.) The flaws in this movie didn't throw me out of the experience.
I've seen a bunch of people praising the fight scenes and people who didn't like them. I think that they were kind of awesome as filmed, but they went on too long, there were too many of them, and way too much property damage with no concern over the casualties. But it was nice to actually see Superman really cut loose on the big screen.