I upgraded my iPad to iOS 10 last night. It took quite a while to complete, and there were a couple of points where the iPad seemed to be locked up, making me think that something bad might have happened, but it finished eventually.
So far, I haven’t found anything in particular that I’m really liking or excited about. On the other hand, there are a few things that are definite annoyances. Having to press the home button to unlock the iPad is the first. I’m sure I’ll get used to it, but it might take a while. Swiping on the lock screen brings you to the camera or the widget list, depending on which direction you swipe. So I guess that’s a reasonable change, though I don’t really feel a need to access that stuff while the iPad is locked.
The biggest change I’ve seen so far, and I haven’t seen much discussion of it, is that they seem to have removed the “next” and “previous” buttons from the mail app. There’s probably some sort of swipe action that will take you to the next or previous message, but I haven’t discovered what that is yet, so for now the only way I can navigate from one message to the next is to go back to the message list and select the next message. I know that I can’t be the only person who was using those buttons frequently. I did find one other guy mentioning it in the comments for this article on iMore. (Apparently, this change only affects the iPad version of Mail and not the iPhone version. I haven’t upgraded my iPhone yet, so I can’t verify that.) Maybe it’s finally time to switch to a third-party mail client.
I’ll probably upgrade my iPhone over the weekend, then also upgrade my watch to watchOS 3. I’m hoping that watchOS 3 is as good as some people are saying it is. I’ve heard lots of good things about it.