I had windows 7 before. Windows 7 was super slow, most of the programmes would not start and it was not useable.
Downloaded windows 10, its SUPER fast, boot up from cold to deskop (including putting in password) is about 15 seconds, it runs well, the apps are all fine and I am very pleased with it - so for me it is vastly better.
The risk is that it plays up, for me it did at first, I couldn't log in but did a system refresh and it cleared what ever the issue was.