I love Windows 10. Working well for me. Apart from the way that OneDrive has suddenly become all needy on me. Nary a day goes by without one of the files that I've worked with throwing up a cry for help like the one above. Usually I can fix this by just opening and closing the document, but it is a bit annoying to have to do this.
One thing I have noticed is that if you get a "Couldn't contact the server to get the latest version" message (which I seem to get a lot more often than I should) you can go into the files menu and force Word to use either the server or the local version, removing a potential conflict. But then I usually end up saving everything in a different file anyway just to be safe which is a bit annoying.
But then again, OneDrive did save my bacon today when I, ahem, made slightly more dramatic changes to a file than I intended. All I had to do was drop onto the OneDrive site and pull back the previous version, which was very nice.