I saw this on opening day, but haven't really had too much time to post lately. I was under the impression that an origin story (again) was going to be a complete waste of my time, but it didn't really bother me all that much. I guess a decade will do that. I think the Lizard made a great villain and Emma Stone is the best thing since sliced bread. Mary Jane can just never show up for all I care.
I'm going to give it an A-. I thought the ending with the serum was really dumb, but I enjoyed everything else. If they can keep these movies coming out at regular intervals, I think this could be the beginning of a great franchise.