Today is the day! I upgraded this morning on my iPhone 6+ and it seems OK so far in my limited use.
Having not touched any of the beta’s and mostly not caring it’s all new features. So far it’s pretty and appears to be just as fast (if not faster) than iOS 9 felt.
My first tweak was
General -> accessibility -> Home Button -> Rest Finger to Open
Which makes the home button work like it used to.
How is everyone else finding the new iOS?