So, I went with the free upgrade. And after using it for a few days here are my initial thoughts: Windows 10: 0% Privacy The OS! Seriously though Microsoft, are you giving out free upgrades because we're paying with all of our "private" information? That being said, the simple changes in aesthetics are welcome, being able to pin 4 windows in quarters is a nice addition, multiple desktops = FINALLY, and something fresh is always a nice change. On the other hand, a lot of settings are unnecessarily extensive to get to and change now, forced updates = , and for the love of whatever it is that they love I DON'T want to give you all of my information for all the features that I don't even want to use! Also, no noticeable gaming performance difference.