I would not define it as masterpiece, but I was entertained for the whole duration of movie and I suppose that's one of the many reasons why people watch movies. I have seen a lot of horror/slasher type films and for many of them I have an inner feeling that director thinks that an audience is stupid. Not this time. Ofc it had some small plot holes and illogical stuff (almost all of the movies does) but it did not annoy me to enjoy.