My biggest problem with this movie is an unforced error in one of the first scenes. Johnny Depp is putting up a copper mesh roof over his patio and talking about how it will block radio waves, and shows the cell phone with zero bars. I work in facilities that do the same thing... except that of course you need walls and a ceiling to make it work and the object is a well-known bit of tech called a Faraday cage. Why they wouldn't have slipped some cell phone guy a fiver to review what they were doing just pissed me off, and it was hard for me to push my mind to not damning the whole movie for a slip like this in the beginning.