Personally I found it really entertaining. Notice I said entertaining and not great. The movie is thrilling but you feel is going so fast you forget what's happening which is a pretty big flaw. Worth watching more than once to really understand it fully. The movie is indeed really entertaining, the music really adds to the thrill and emotions you feel throughout the movie, Affleck's Batman/Bruce Wayne is by far MY favorite, Cavill's Superman was solid in my opinion. Another flaw is the action. Hate to spoil it to you but the fights between Batman and Superman last no longer than 6 minutes which sucks because the whole movie builds such hype, especially from the trailers, just to see 6 minutes of batman and superman taking it at each other. But it SOMEWHAT makes up for it with Doomsday. The action sequences with doomsday are good, but again, TOO SHORT. SPOILER: doomsday was just created and literally dies like 10 minutes after his birth in the movie lol. Another flaw is that we never see Doomsdays full form, we just see him baby naked literally and then just grows a few thorns on his upper body and that's it then he dies later. More of a Wonder Woman backstory would be appreciative but I believe you can tell why she is in the area after going unnoticed for so long. Ok so overall, yes the film had flaws, BUT, it was epic and really entertaining. It was kind of rushed and you forget what's happening sometimes but remember this film was heavily edited to a shorter runtime so it wouldn't be too long and lose audience members. The extended edition would certainly make this film much better.
Yes worth watching. Definitely worth it, especially with Affleck's Batman

Who's more sexier Batman or Superman?