If you are watching this with the hope of guts, gory and also over the top sharks killing, you will be a bit disappointed. Eventho one of the characters did die being eaten alive by a shark.
I watched this movie out of curiosity, and I watched it till the end. What I love about the movie is it doesn't focus on how the shark hunts it's prey but it focuses on the the characters themselves.How they handled situation, and the extend of what they would do for each other. The starting of the movie plays a role in setting the tone of awkwardness among the characters (due to past history). And how the awkwardness transition to how strong their bond of friendship is.
What I didn't like about this movie, maybe the duration of it, because it did feel a bit draggy.
Overall, I enjoyed the movie, but do manage your expectations if you are hoping for a man vs beast scenarios like in Jaws, The Meg, or even The Shallow. It would not put you at the edge of your seats with jump scares but it does play with your emotions.