Ah, it's not THAT bad, you great bunch of babies. I mean, sure, Cara Delevingne is fecking woeful as Enchantress, and I have no idea what Adewale Akinnuoye-Agbaje was saying half the time (I'm also a bit pissed off that I'm having to Google how to spell all these names). Pretty much everyone else was quite good, particularly Viola Davis and Will Smith. I even liked Jai Courtney, and I still haven't quite forgiven him for Die Hard #whateveronehewasin (that's a number sign, not a hashtag)
Can't say I liked Jared Leto's Joker though. I get the aim, but it just didn't work for me. I hated the last 30 Seconds to Mars album as well, so me and Mr. Leto aren't on good terms right now.
The big issue here is that it's all over the place. Even with a solid chunk of exposition, there's a whole buttload of characters to introduce, and then it's being tied very loosely into the whole Batman/Superman/Justice League thing (mainly in a "hey guys, here's Batman, just in case you forgot this is all part of the same universe" sort of way.
The tone is all over the place as well, there's times when it veers towards being almost a nod to Deadpool or Guardians of the Galaxy, and I hate to say that because it looks like I'm starting a Marvel vs. DC thing, and nobody wants that, but I thought the soundtrack was very GOTG, except where GOTG seemed to have been carefully curated, this was a case of "OK, we've got a scene where Harley is doing stuff, let's just stick some Black Sabbath in there because Black Sabbath are cool."
So there's issues. There's also positives, the action's good, quite a bit of the humour works, and I'd be happy to see the majority of the characters again. Also Margot Robbie is in this, and that's always a bonus.