Well I lasted 2 days with Windows 10 and had to recover back to Windows 7.
Scroll function on mousepad didn't work
Backlit screen didn't work so screen was dark
Had to google a hack to get some software working
Facebook videos wouldn't play as well as BBC iPlayer, ITV Player etc......
Online banking protection software wouldn't work with new browser Windows Edge - Push you over the edge more like
Blah Blah Blah Windows 10 Blah Blah Blah
Didn't work for my laptop
Luckily you get a months grace to recover back to your previous version... So I did the recovery and in 10 minutes all is well again