Comment Working Great (Score 5, Informative) 149
I've been using 9.1-RELEASE since SVN was tagged 2012-12-04 on both my home and work desktop. ZFS root is awesome, and userland is pretty much the latest bleeding edge upstream, I've had absolutely no issues running a full-fledged XFCE-4.10, Firefox ESR 10.x with Flash, 3D accel, everything desktop.
I've used freebsd-update to go from both 9.1-RC3 and 9.0-RELEASE to 9.1-RELEASE also switching to pkgng.
I'd recommend folks to look at the following guides if they want to use ZFS root or create a nice, full-featured desktop OS.
http://forums.freebsd.org/showthread.php?t=31662 (ZFS ROOT)
https://cooltrainer.org/2012/01/02/a-freebsd-9-desktop-how-to (good desktop guide)
Great job BSD devs, keep it up.