Mostly it works good, system is very fast.
Sleep doesn't work: system just shows lock-screen. After sleep attempt, sys-net freezes and qubes manager fails to change netvm in firewall-vm with error "lib xenlight failed to deattach network device".
Sometimes qubes freezes, and Ctrl+Alt+F2 doesn't help.
When I load with kernel 3.12 or 3.11, X (or Xorg, or KDE, I can misunderstand terminology) fails to start, and shutdown doesn't work.
Haven't tested integrated webcam, but usb webcam works.