Took Greggy to see it last night at a sneak preview.
The criticism about the main mission being kind of slow / not interesting are fairly valid.
I didn't care if they accomplished the mission or not, it was more fun seeing the characters screw around together. Which isn't to say the main mission was terrible, it just wasn't the part of the film that was most interesting.
Saying the Joker is in it for 20 minutes is generous.
Diablo was the biggest surprise of the film. I didn't think I was going to care about him, but he ended up being one of the best parts.
Deadshot and Harley were probably the best parts, they were both fantastic. Amanda Waller was excellent, but she isn't as Likable as DS and Harley...which I probably the point. But Viola Davis is perfect as Waller, and I'll be very happy if she continues to antagonize the DC universe.
Killer Croc was Awesome. He doesn't have a whole lot to say, but he has some good one liners, and the make-up looked cool.
Katana is OK. She speaks in Japanese the whole time, with sub titles. She has some cool action moments, but other than that not much to work with.
Flagg was good.
Enchantress' first transformation scene was really cool, where she does the hand holding thing.
2 Members of the Justice League make appearances. Everyone knows Bats is one of them, the other one is hopefully a surprise for people, because the little cameo is great.
Overall, I really liked it. It isn't nearly as bad as some of the harsh reviews say.
I will concede that the main mission isn't very inspired, and the enemies are not terribly interesting, but there is enough going on within the Suicide Squad to keep it fun and engaging.