Lack of good storyline.

Fun premise, good actors, bad writing. This film seemed to have potential at the beginning but it quickly devolves into a trite action film. Ultimately it's very boring.

if their story seems completely bonkers, almost like a feverish work of fiction, you ain't heard nothing yet.

Unshakable, witty and deeply felt, the film will be paying emotional dividends for a long, long time.