From Drew McCormack, in Under the Sheets with iCloud and Core Data: The Basics:
I’ve spent the last 3-4 months integrating Core Data syncing over iCloud into Mental Case for Mac. (…)
To say it has been a challenge would be an understatement — it has probably been one of the hardest tasks I have ever undertaken for a Mac or iOS app.
Core Data looks scary.
iCloud can be intimidating.
Core Data syncing via iCloud looks scary and intimidating…