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Really good watch, could watch again, and can recommend.
A big fan of Michael Peña ("Ant-Man") and Lizzy Caplan ("Mean Girls"), and while both are (more) traditionally comedic actors, this definitely shows off their range.
While the production value is actually quite good, some of the choices at least give a nod to older b movies. The invaders' armor, in particular, looks unnecessarily ridiculous.
Almost everything that makes this movie really good though is trapped behind spoiler walls as there is a mystery aspect to the movie: even in the premise.