I've had it installed since August and don't like it at all. Seemingly as many things were removed or made more complicated as were added or made simpler, and the former were useful while the latter are not so much. As guinness pointed out, right click support is poor and is especially pathetic when you right-click on the taskbar. Also, the highly useful Action Center has been replaced with something much less useful. It's especially annoying that, after nearly 7 years of accessing Settings from the right side of the screen, the only way to get to it is from the Start Menu, which I rarely use and have on the left side of the screen. Of course, it also breaks the taskbar utilities that I use, like 7+ Taskbar Tweaker. Finally, the UI, including the rounded corners and icons, looks too cutesy and Chromebook-inspired (which it was). If I wanted something that looks and functions like a Chromebook, I would buy a Chromebook.
I'm glad that I installed it on a secondary machine. I'll monitor that for changes and, maybe, Microsoft will add or roll enough features back to justify upgrading my daily machine. Until then, I'm going to stay on Windows 10.