This is a direct continuation of the Maze Runner, picking up right where it left off - a helicopter taking the band of survivors over a zombie wasteland of a city to the relative safety of a non-descript facility, run by Littlefinger (Aidan Gillen). While that should set alarm bells going off in audience members who watch Game of Thrones, it takes the protagonists a slightly longer time to clue in that not all is as it seems. I suppose that's only natural since they don't have HBO.
It channels a bit of Fallout too.
Like the previous movie, there's a fair bit of action here as well as some well needed answers as the world is a bit more fleshed out which has surprising similarities to the Star Wars universe (sans Jedi). Don't expect an explanation for the giant spiders in the last installment though. Ultimately the film serves to move pieces around the board in preparation for the next one, ending with a slightly unsatisfactory climax.
All up I feel it's still worth a watch with good effects and valid reasons why the antagonists aren't so effective, but mostly because it is the bridge between movie A and C. I give it two and a half zombies out of five. Would I watch it again? Only if it happens to be on and I'm too lazy to change the channel or do something else.