I was using Windows 7 and I got Windows 8 after registering on website. Microsoft just tried to make it smooth and flat. Win 8 had many great feature but overall OS didnt had ease of operation. After few months the give update to Windows 8.1
I would say Microsoft has improved lot of things in Win 8.1, especially the menu bar, task bar, file menu and start menu along with login page. I must appreciate their efforts. Most amazing thing is we can change the theme of the Start Menu which is the limitation of Win 8.
But same thing in Windows 8.1 there is no ease of operation, you get confused in the control panel and the network(including WiFi & Bluetooth) settings are very complicating. Overall appearance is great but User Experience is not up to mark.(Win 7 is better in terms of User Experience) Currently Im using Win 10 which is awesome.