2 of 21Image
iCloud: Great for document sharing, but awful for sync
(Image, screenshot: ZDNet)
With iCloud, you can work on a document on your Mac and instantly switch to your iPad or iPhone. You can also sync your contacts and calendars. Except many can't, or won't. The problem with sync is that you can never tell whether something will be overwritten or not, or which 'wins' — the server or the device. The upshots of iCloud are negated by its failure to work half the time. Contacts in particular go everywhere, duplicate, or simply fail to sync.