For everyday experience it's one of the better versions of Windows, definitely better than 8/8.1, though the Start menu is still less well designed than the one in Windows 7. But you have to accept some potentially very intrusive terms of service, you never really know what information it's disclosing about you, and it continues the trend of control over devices being taken away from users in favour of the hardware and software corporations and govermnents. Linux is a preferable OS and if you don't need Windows-specific software (or if you can get away with VMs or Wine) you won't be missing anything significant without Windows these days. Like many people though I'm stuck on Windows a lot of the time because of the software I use.
It's nothing revolutionary but they have tidied a few things up. The main changes that make the transitions less jarring are: 1. If the computer uses a keyboard and mouse (rather than a touchscreen) it will default to desktop mode. 2. In desktop mode, the start button brings up a menu, not the full screen Start thing as in Windows 8. 3. In desktop mode, the "Modern" applications can now be opened in a window instead of full screen. This is my experience from testing it in a VM on a desktop PC. Tablets will do something that looks more like Windows 8, and I'm not sure about touchscreen laptops.
kleinbl00 cannot be just one person. He/she/it knows too much.