I grabbed the 164 on a whim a week ago in Tahoe to replace a board I destroyed.
This nasty stick is freeride demon. Simple, clean graphics with a carbon black look that has a sparkling/pattern/ shine to it---sick.. Large nose with 10mm taper(It's basically A Custom X with taper) and setback stance allows the board to sail over crud/chop etc. . (It's the only board in the 2009 lineup that features the Powder fly 3 core which is lighter in the nose allowing the board to slay pow) Slight adjustments need to be made when landing jumps due to short tail, but once I figured it out, I landed everything and it was not an issue.
Pretty stiff, but not quite as stiff as my t6, As you might expect, it takes some effort to Ollie, but it snaps in and out of turns nicely. It's a wider board(I think it's a midwide), so it's average edge to edge, but you can crank it up to face-melting speed with zero chatter. It's stable and the Stainless steel PDE edges make it a carving machine. As with most high-end Burtons, the new N2O vision base is fast as I blew by almost everyone all day, but I never got to see it's full potential as I was stuck riding with the lame factory wax. I imagine it's as fast as my t6, But I can't call it the drag race winner till I get to hand-wax it.
The board is also surprisingly lightweight(even at 164)due to the Carbon Vaporskin topsheet., Powder Fly 3 core etc. The Super X basically has almost every piece of Burton tech thrown into it and it rides like a Ferrari-fast, light and stable.. Burtons High-end decks(t6, CX, Super X) are LIGHT-years ahead of the low-end models in performance.
This a great board for the advanced riders who rip Big-mountains(Vail/Squaw/Jackson Hole)--wide open bowls/steeps/powder