CoreData and iCloud

Question

I am developing a core data application and was thinking of adding iCloud support, but after looking around on the web I frequently heard that iCloud+CoreData is unreliable

Answer 1

The link to the video has changed: https://developer.apple.com/videos/wwdc/2013/?id=207

Edit: This should be a comment to the last answer but I don't have the required 50+ reputation :(