I haven't. I have friends that have, and those that upgraded
   generally love it. I'm not crazy about the permanent always-on
   connection to the Internet that's sorta necessary, nor the
   scrambling of the hard drive for encryption (after my mother's
   computer got hit by CryptoWall 2.0 ransom, I'm really not keen
   on that idea being used.

   That being said, if my next computer COMES WITH Win10, I'll keep
   it. I'd just go with the flow at that point.