Agreed, update was seamless and other than the bug affecting the Health app, it appears to work just fine. Even portrait mode in beta works as expected. However, as mentioned all data on Health app has disappeared and the app will no longer record data. There are a lot of reports of this on Apple discussions btw. So beware that the update will likely affect your Health data/app as well.
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https://discussions.apple.com/message/30857952#30857952
https://discussions.apple.com/message/30857952#30857952
https://discussions.apple.com/message/30855294#30855294