I've had a lot of wonkiness with Keychain, iCloud, and iMessage since the upgrades, but that seems to be because certain preferences were reset or deactivated i

I've had a lot of wonkiness with Keychain, iCloud, and iMessage since the upgrades, but that seems to be because certain preferences were reset or deactivated in the process. (I'm also willing to accept user error as the culprit). Have also had some weird issues with wifi connectivity, which is ostensibly one of the reasons for this update. And there have been some strange lockups on the mail screen on my iPad, occasionally forcing me to hard-close the mail app. Other than that, I haven't noticed anything significantly "bad" about the updates. Yosemite has been fine for me, and aside from some third-party compatibility issues (which happen with every major OS upgrade), the upgrade has been seamless. iOS 8 performs well, aside from the aforementioned problems.