My desktop, five minutes ago.
Bugs and rough edges (of which there are still many! remember to run Windows Update!) aside, I’m very impressed. It just feels nice to use. It definitely doesn’t hurt that I’m running this OS on the hardware it was designed for – I’m on a Surface 3 with full pressure sensitive pen, keyboard, mic, webcam and touch support in a really really neat little package. (I’ve had the machine for a few weeks now and love it.)