It isn't terrible. But it isn't good.

Rating: 6/10 (22 November 2017)

One thing that makes DC different from the others is that they are dark, gritty and often realistic. However Justice League takes the friendly lighthearted approach in hopes of following the Marvel formula. In doing so it lacks any emotional heft or tension. Also with only Superman and Wonder Woman having their own standalone movies, its very obvious DC are eager to keep up with Marvel.
However it is less gloomy than Batman v Superman and it doesn't drag on as much. The story feels more focused and a lot less cluttered with no set up to other instalments. Izla Miller and Jason Mamoa are good in their roles as Flash and Aquaman, they are easily the best characters who could have done with their own standalone films. Ray Fisher as Cyborg is OK, he does have a good story arc as half man/half machine, however he doesn't contribute to the team much, he just reads files and fixes things.
Some of the action scenes are enjoyable including Wonder Woman foiling a terrorist attack and the team fighting Superman; But most of it is forgettable. Danny Elfmans score isn't bad, with nods to Batman (1989) and Superman (1978). Unfortunately the plot is very thin and lacks any originality or logic. It revolves around super-villain Steppenwolf chasing down three cubes in order to rebuild the earth. This prompts Batman/Bruce Wayne to bring together his super-team and eventually bring Superman/Clark Kent back from the dead. Steppenwolf is a boring villain who lacks any substance. He doesn't do anything but talk tough and punch things, he just leaves his disposable insect minions to do most the work.
There is never a sense of real danger as no one ever gets hurt, except only at the beginning involving the Amazonians protecting the first cube. But from then on, there is only one or two civilian casualties and a few minor injuries here and there. When it finally comes to the finale, it is cliché and generic. It literally just feels like a rehash of X-Men Apocalypse.
Ben Affleck isn't given much to do this time, he just looks bored which is a major disappointment as he was easily the best thing about Batman v Superman. Gal Gadot looks to be slowly loosing enthusiasm playing Wonder Woman too. At this point its only the new members who seem to be enjoying themselves.
Midway through Post-Production, Director Zack Snyder had to quit because of a family tragedy leaving Joss Whedon (director of The Avengers) to finish the job. This included filming re-shoots and finishing visual effects shots, all in the space of a few months. This results in the film looking very cheap, the visual effects are often lacklustre with many of the scenes being shot on obvious green screens. Its no wonder WB delayed the reviews, its as if they already knew it was doomed.
Overall Justice League is OK to pass the time. But there is just too many characters who are given too little to do. Yes it is enjoyable in parts, but Its nothing special, its not the worse film ever made, but it should have been A lot better given the $300 million budget and cast.