I reserved my free copy, because I like the free part and Microsoft is soon to drop support of Windows 7. I have worked with Windows 8.1 and find it frustrating. I hope Windows 10 looks more like Windows 7. My biggest concern is if I will have to beef up my computer as Microsoft is notorious for bloating up new editions of Windows. Fortunately I have a home built desktop and can easily add more RAM or a faster processor.
This is a smart move by Microsoft as when the venerable Windows XP was retired millions of users (including me)did not rush out and buy the upgrade. Too bad Microsoft is soon to retire Windows 7 as I find it the best Windows platform yet.