Sweet fark, this is fantastic. I've got XBMC running on Windows 8.1, with remote apps on iPhone and iPad mini, with a Hauppage HD PVR for recording.
Great interface, and easy to use.
Yeah, I really dig it, though at the moment it's not really jiving with OSX Mavericks.
I think Plex's media management is still better, but XBMC just runs a shitload better on my Mini.