On the surface, this movie is entertaining enough. It provides some suspense and a decent plot. However, if you're the type to piece together the information and try to understand the characters' actions, you may be disappointed.
The tension is enough to keep you interested but not riveted. The story line could have been better developed to avoid the questions that the deeper thinker will find. The plot doesn't get too complicated e.g. faked deaths, etc. But there are enough lies to at least keep you watching to see if you're right about who's telling the truth. And you probably are.
Overall, it works just fine for tame, quiet Friday night entertainment.