So far I'm finding Keychain to be more trouble than it is worth. Keychain offers a generated password on some sites, then doesn't save it. (e.g. MacRumors, NewsBlur) Keychain fails to recognize some fields as password fields. That's fine, I can create my own. But manually entered passwords typed into Keychain aren't synced to other devices. There's no way to view the keychain on iOS devices - outside of the Safari saved passwords. (related to #2 above) Changing passwords for Facebook and Twitter work online - but Mavericks can't validate the new passwords in the Internet Accounts settings page.