iCloud has been a constant nightmare for me.
I don't know where to start. Maybe the biggest nightmare is that since switching from Mobile Me to iCloud, every time I quit mail, or restart my computer, all my accounts from my mail app, and I have to add the accounts all over again. And then there's the inability to edit my contacts in the Contact app. I have to go online and do it at icloud.com.
Oh, yeah, and the fact that my bookmarks keep getting wiped out everytime I restart my computer is a real drag.
But when I try to change my prefs, iCloud prefs tell me that "this is not my primary iCloud account." ***???
This has been one massive nightmare and pain in the *** from the second I switched from Mobile Me. I haven't seen Apple drop the ball on this level for a really long time.