There isn’t anything glaringly wrong with Copshop. It’s got snappy dialogue, solid action, and it hits my favorite trope: the "trapped in a single location" survival fight. It’s a fun ride, but it never quite does anything well enough to be considered amazing, which is where it ultimately falls a bit flat. It’s a perfectly fine watch, but if you’re looking for the gold standard of this genre, just go watch Assault on Precinct 13 instead.