I'll tell you why so serious

I like movies that are aware of what they are selling... without [any] greater aspirations than to make people laugh and that's it.

Entertaining from beginning to end, it maintains the spirit of the franchise while establishing it's own seal with a fun cast

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.