I hadn't read a single thing about MoS except that it was coming out, so I had zero expectations going in. I have to say I liked it a great deal. It was a true reboot / revisiting / retelling of major elements from the late 70s / early 80s Christopher Reeve Superman films, and probably major plot points from comics that I haven't read.
This may be entirely shallow of me, but for my money the best thing about those Christopher Reeve movies was the space goths, particularly Terence Stamp as General Zod:
I mean, shit man. Wow. Not to mention Hot Chick and Big Dude:
On the Hot Mess side of things there are a ton of flashbacks, lovingly filmed in gauzy nostalgia-vision. Whether those work for you or bother you probably depends on how you feel about flashbacks. I think they did work to give Clark Kent a bit of depth, although not too much because hey, this is a Hollywood movie.
More confusing were the riffs on Communist art. Apparently, Krypton storytelling involves silvery montages that look basically like this:
There was also some rough bombastic acting at the beginning, but I figured maybe on planet Krypton, you have to be a little yelly if you want to get your point across.
Basically, I liked it more than most movies that are 90% CGI polygons flying around at a ludicrous speed. Henry Cavill is ridiculously easy to like for a guy who is also insanely handsome. I loved Amy Adams as Lois Lane, particularly since Lane gets to do more than be nosy and get rescued. No one is Terence Stamp but Michael Shannon is mesmerizing in his own right (watch Take Shelter and you'll appreciate what he can do). Good times.