This would be a good film to see... If you don't mind seeing generic "stalker" films without any ounce of originality or if you want to see a film that could be considered an unintentional comedy.
I should have known that this was going to be hilariously bad the moment I heard the first dialogue. It starts off with Jennifer Lopez jogging and remembering the night she kicked her husband out of the house when he cheated on her and the first dialogue is him begging, "Please, let me stay!" but it's so whinny and childish that I laughed my ass off. It also didn't help that there was a bit of an echoing during the flashback moment. Ultimately, the first half of the film is appallingly cheesy and corny. At first, I thought I was watching a totally different movie with all the same actors at first, because it felt like the worst romantic/temptation movie I've ever seen. I was willing to give this movie a 1/2 star. There is nothing redeemable about the first half of the film, unless you want to see something so bad that it's funny. Not even the sex scene is good. For an R-Rated movie, it felt like I was watching a very tame PG-13 movie.
The second half, specifically when the guy turns into a psycho stalker, picks up and gets a whole lot better. The dialogue is still bad, but the violence and extremes the stalker goes to gets so over-the-top and intense that the bad dialogue somehow fits well in the film. I did not like how the stalker turns the kid on his father, because the argument the stalker makes it's just so dumb. The film also seems like it's trying to be like The Guest, but failing miserably. It finally turns into the kind of film people went to theaters to see: a dumb over-the-top, R-rated stalker thriller that you could just have a fun time seeing. The second half saves it from being absolutely awful and evolves into an actual R-rated film. It still doesn't reach the level of intensity that it needs for me to give it a 4 or a 5 rating, But I can see people still having a good time watching this film, if you don't mind trudging through the painful first half of it.