The nature and sound of Johnston's music is an acquired taste, and that also goes for director Jeff Feuerzeig's documentary -- though the film is intelligent and approaches the various mental-health issues addressed here in a sensitive manner.
Though Feuerzeig's film isn't quite successful at underlining what exactly it is about Johnston's childlike art that makes him so appealing, the documentary works superbly at proving Johnston is insane.
Heartbreaking, funny and inspirational, in equal measure - it'll also make you want to buy at least one Daniel Johnston album and you'll probably find yourself singing Casper the Friendly Ghost for the rest of the day.
Rock 'n' roll's capacity for recycling legend means the stories of Johnston's life, and the way in which they're told, could easily fall into cliché. Instead they are original, engrossing and sometimes heartbreaking.