Took the plunge and it feels good. Turned off as much telemetry and whatever as possible. One of my two complaints resolved when I disabled AlwaysMouseWheel, and it turns out it's redundant anyway since Windows 10 seems to have the function (you don't have to "activate" windows - clicking on them - before scrolling in them, it is really hard to live without it when you're used to it) built in. The second complaint might resolve after a reboot - no sound as of yet. It installed drivers, so we'll see. When I reboot, which is rarely. It's fast, but still annoying.
The UI is still kinda split between two worlds (tablet-everything-huge-buttons and old style desktop), but it's not as jarring as Windows 8. "Settings" don't actually contain all settings that should be there, you still need the Control Panel and its associated tools for many things.