Based off critic's reviews I assumed it was going to be garbage (like the last couple of Gerard Butler movies I didn't like - Geostorm and Den of Thieves.) Today was rainy and it was still in the cinema so I gave it a try. Hunter Killer is the best action movie I have seen at the theater since Mission Impossible - Fallout. No kidding. Not equally as good or well made as MI, but the best since MI.
Hunter Killer is an almost-great, suspenseful, fun, exciting, on-the-brink-of-war movie which is absolutely worth your time if you've even considered watching it but haven't yet. It was a 2 hour suspense film that kept me and the other few viewers in the theater (their enjoyment was audible) on the edge of our seats.
No spoilers here, but understand that the majority of the movie takes place underwater inside a submarine that is trying to evade detection and avoid torpedoes, and it is quite effective at drawing the viewer in for a fun ride. Go see it. Or wait for streaming. Either way you will probably enjoy it.