I have Windows 10, my current laptop was bought with Windows 8.1, which was not very easy to use. I think Windows 10 is much improved! At work, I still use Vista...
My mother, who is 76, is enjoying Windows 10, much better than 8.1.
There are some bugs, no doubt, I lost my 'start' button (the best improvement over Windows 8
) for a few weeks and then it came back after some updates. It sometimes loses the pointing device, and gets a bit 'hot' when I insist on having 4 or 5 windows open at the same time. Otherwise, I think it is a great improvement over 7 and 8!