Yeah. I have a Smoothieboard (Panucatt x5 mini v2) with a Viki 2 LCD on my 3D printer, and it's really nice having the all-in-one unit which allows direct control and the jog wheel.
That said, I did get a Contour Design Shuttlexpress: http://ergo.contourdesign.com/US/product/shuttlexpress/ which while not as nice as the unit you linked, is quite serviceable (and I was fortunate to get a bargain on eBay) and it's very cool to use, though I wish that other comm / control apps would directly support it as Chilipeppr does. Esp. since my main reason to buy the thing was to support modifier keys in Macromedia FreeHand and there's one which I need which doesn't work (so I had to get an Azio Levetron Mech5 keyboard for its D-pad).