Lots of fun, as long as you don’t think about any of the actions taken by most of the characters. Massive plot holes effectively spackled over by a crack team of scenery chewers.
Also: one of those movies that gives away waaaay to much in the trailer. Not everything, and not the end of the film, but still very spoilery. There should be a law that anything used in a trail from anywhere after the first act must be meaningless without context.