I and so have many others have been using iOS 10 since the 1st dev beta came out. Currently we are at Dev beta 3 and Public beta 2. I have gotten so accustomed to the new features in 10 to the point to where iOS 7-9 all feel clunky, like unfinished projects. When 7 came out back in 2013, it didn't feel like iOS at all. I was so attached to 6 and older that I couldn't enjoy anything in 7 at all. I have always hated flat design with a passion and wanted to break something when I found out that my all time favorite design was getting replaced by the most ridiculous, soulless, and goofy UI ever. I hated every moment I had with 7-9, but when 10 rolled around and actually started feeling like something Apple made, I really liked it. I still don't like the icons, and app design, but the new widgets, banners, notification center, control center, and app animations, and much more really make the OS feel complete. It looks great and and works tremendously well. iOS hasn't felt alive since iOS 6. To me it felt like it was there, just because it had to be, but 10 feels like its alive with all the awesome interactions you can make with it, the more life-like sounding Siri, and nice smooth animations that actually run around 60fps as opposed to 30- on 7-9. It feels friendly. If 3D/Skeuomorphic design was still tied into iOS, polished and fine-tuned with all the new features in iOS 10, This OS would be perfect to me. Its great the way it is, but that one little thing would set it off for me. I would love it. You are probably thinking, "how would that design tie into 10 and look good?", Well its hard to explain and I'll probably have to make some skits showing what I'm talking about. Can't stress this enough, iOS 10 is great!!