Some of the comic bits are a little too broad and silly, but Derbez, in his feature debut, makes Instructions Not Included a balancing act more successful than it should be.
There's a lot of movie here with unexpected developments, held together by the irresistible chemistry between Derbez and his adorable pint-sized co-star.
The ending of the movie is a real grabber, the sort of thing that lifts and improves a tediously long and otherwise mediocre film and tricks you into thinking it was better than it really was as you leave the theater.
Instructions Not Included is a sporadically amusing but unduly protracted dramedy that slowly — very slowly — devolves into a shameless tearjerker during its third act.