Nice upgrade. One minor change I would have liked is the relocation of the led lights. I've placed a wireless trackpad in the middle and it covers the led lights, so I don't always notice immediately that I've (or my cat) accidentally activated the Keypad. But I suppose the new non-rubbery MX function keys will eliminate such accidental keystrokes.
Oh, and wireless would have been nice too.
Missing: the 2-port usb hub on the back?