I want to say first that obviously this is not for people who are into Scorcese dramas or any type of serious films.
If you don't like this movie because of the plot, or because of its absurdity, then I wanna give you a bad review on your life. This film is not about being realistic. It's about fun, gore, and nudity. If you can't understand that, then please stop and think before you buy it.
The plot is ridiculous but that's the whole idea behind films like this. For me, it didn't leave me scared of going into the water or anything, it just left me laughing and cinematically satisfied. The whole movie is really funny.
The acting is pretty well done, I felt. Obviously not Oscar performances, but again, you can't expect that.