Absolutely wonderful to watch. The kid had similarities to Woody Alan's style, yet not annoying, not much seemed at all contrived, clever writing and/or improve (which ever, it was hard to tell), I'm not usually a fan of pot smoking scenes, but this one had a believable on thet was fun to watch and convincing, even the bad guy was cleverly played, interesting back drops and locations constantly keeping my interest, added fun ideas; including carnival atmosphere, treasure - whatever they called it, the oldest man dieing on the birthday of the next oldest man, and the list goes on.
If you look at all the criteria of what makes a comedy, this one really had all of them. It wasn't a full on belly laugher, but simply a feel good, fun to watch happy ending and VERY clever movie.