a point on ergonomics.. if those buttons are keyboard standard size.. i think theres a few too many buttons for it to be comfotable to press the buttons closer to your palm. i have big hands and trying to use WSAD(QE) FPS controls on a standard 101 keyboard gives me horrible RSI type cramps after a while. just something to consider.

if the point of a unit like this is to concentrate keys you use most often to be accessable without moving your palm. great.. but if you just want extra programmable keys i think i prefer the look of the x-keys for its flatter, easier to navigate design.. more like an extension of the keyboard rather than an attempt at an ergonomic palm rest.