I've been unsystematically going through a lot of these Warner movies and this is one of the better ones for me, if not the best. I'm an old (uh, maybe that's not the best word) Superman - Batman fan, so I keep an eye on the the two series and the Justice League from time to time.
Though others have described this movie as a basic super-people brawl, I found enough character development and interpersonal "stuff" to make it more interesting than a simple super-fistfight.
I would have preferred a bit of the "old" (40 years ago) comic book Braniac, as the current Brainiac doesn't seem very "brainy" in this outing, but I like what's going on with Super Girl.
My favorite Superman characteristic is that in the end he USUALLY outwits his opponents rather than simply pummeling then into the ground, and there is a version of that in this movie as well.
I don't know the numbers, but count me in as as adult fan who likes the stories to be as intelligent and "meaningful" as possible. Keep 'em coming, Warner Bros.