So I saw it today.
Liked it better than I expected. I'd say it's probably worth a full-priced ticket.
Short and sweet:
Good:
1. Jason Momoa shows that he can carry a movie as the lead. I'm not saying it's the deepest performance in the world, but he carries a lot on charm and swagger without becoming one of those "Oh for pity's sake, don't let this jerk open his mouth again" kinds of "brash" characters.
2. Spectacle. There's some genuine visual spectacle at work here. Some of it is, perhaps, a little too reminiscent of Tron, but there's an extended scene of being pursued by feral fish-men that just made me go, "wow".
3. DC finally made a movie that suggests that, at least some of the time, being a superhero might just be fun rather than a constant onslaught of over-sized responsibilities and burdens.
4. Some effort is made to give the villains more by way of character and motivation than "I exist to destroy things" or "I'm insane". Black Manta's deal isn't exactly subtle, but I appreciate the effort.
5. The supporting cast is largely excellent. AC's father gives a particularly nice, understated performance.
Bad:
1. The third time a relatively quiet scene is suddenly interrupted by an explosion smashing through a wall, I began to wonder if the director wasn't perhaps a bit excessively fond of that trick.
2. Screenwriting by-the-boxes: This isn't nearly as bad as Dawn of Justice, but there's still a definite feeling of "this scene establishes backstory, this scene motivates villain, this scene establishes romantic chemistry." Well-written movies still accomplish these things without giving the viewer the sensation that particular boxes are being checked off, rather than the scenes in question being part of a living whole. As I say, it's not as egregiously visible as in some efforts... but it's still there.
3. Powers are... a little vague. Don't get me wrong, it's better than ten minutes of exposition of exactly what everyone can do. But when our hero keeps ticking after being hit by a weapon we've seen pulverize rock, it can't help but upend the stakes a bit.
4. If you've been keeping half an eye on the promotional materials, a moderate-sized plot reveal has already been spoiled for you. It's not exactly a huge surprise, anyway, given who's involved, but still a bit of a let-down given that the movie wants you to think it's a surprise and directs our hero accordingly.
5. This is a solid movie in its own right, but that's what it feels like: a solid movie in its own right. Justice League barely comes up, and if you missed it, you won't miss a beat; likewise, if this movie's events mean squat-all to the next Wonder Woman movie, it will come as no surprise. If you're expecting a movie that furthers the sense of the DCEU as a cogent movie universe, this isn't going to do it for you.