So far it is smoother than butter, like I am super surprised! Touch ID for notes app! I would imagine at release it being also available for messages and other apps as well
Official sunset just a few minutes ago. I kind of like the Night mode. In case you don't like it you can easily adjust or disable in brightness settings.
I set up a password for Notes and it doesn't ask for Touch ID or password when I use Notes or access a note. Night Mode is awesome. It should have a toggle in the Control Center.