Well first of all for a (first) beta I find this release really stable. Haven’t experienced any weird things going on yet. I’m running this beta on my iPhone 6S Plus, which is also my daily driver. I absolutely love the new raise to wake function. I can quickly look at my phone, screen turns on. Great! On the lockscreen it annoys me a bit that I have to press home to unlock. I didn’t have to slide to unlock in iOS9, why do I have to press it in iOS10 instead of just letting it scan my finger and go?
As for the widgets, they’re cool. Especially with 3D touch. But I hope they’ll be customizable in the future. Because for example; I don’t use VIP Mailboxes; Mail widget shows VIP Mailboxes so it’s empty for me. Same with Music since I don’t like to use playlists.
Speaking of music. Oh boi, please lower the font size as a starter because 5 menu item fills 75% of my 5.5" screen. My music is getting pushed away into a corner by the huge bold fonts everywhere that take up most of the space.
Siri now understands follow up questions. So if I want to change a bunch of alarms in a row I don’t have to start over at square one everytime. Which feels way more fluent and is easier to use.
And last but not least, I no longer have to keep a extra’s folder somewhere on my last page filled with Apple stuff I do not use because you can finally uninstall stock apps!
I really like the new functions iOS10 brings! But, as for the design aspect; they still have a lot of work to do imo. The music apps is the worst, The notifications I’m still wondering how I feel about them and the new "no contact picture" for example is just awfull.