Finally. The iCloud we deserve.
I'm currently using iOS 7 and OSX Mavericks and have to say that iCloud has been remarkable. Everything finally just works. Syncing is fast and fluid. Most importantly though, everything happens in the background. iCloud tabs, notes, reminders, notification sync, iMessage sync it all works. I am very surprised because it's beta software.
This isn't anything revolutionary in the slightest, but it's great that Apple seems to have its act together. Finally.