The Suicide Squad should probably stop here. The first movie was interesting, and this was a bit funnier, but the story line was basically the same and the overall action about the same as well. Loved James Gunn's take on it though, so I'd give it a 1 time "fun" and "silly" watch.
Definitely didn't live up to the standards of other comic films by DC or the comics themselves of the same name. Barbara is tossed around like some child (and some questionable content too) and Joker has no additional content to his background. Skip unless you are a hardcore fan, and maybe skip even then because it seems completely out of place.
After watching this after a very long time, this is basically an inverse of Mad Max. Swap out the desert/barren wasteland for the barren ocean and it is practically the same (all the way up to oil being a rare resource, and the evil leader providing small "gifts" to pacify the subordinates). Despite this, worth a one time watch for this classic action movie!