Such a frustrating disappointment

It’s not bad or unwatchable but despite the amplitude of the spectacle, the end result is underwhelming.

The film never slows down or bores, plunging from one harrowing sequence to the next.

It's funny, it's tense, it features two great performances from two actors and the director expertly creates a web of odd tension where you actually don't know what is happening for the majority of the run time.