The Printrbot Go is a peculiar beast. It's not everyone's cup of tea. It doesn't try to be the printer for the masses (that's the Simple!). It's large, funky, portable, and expensive, for Printrbot, but it does pack a punch.
It has a Raspberry Pi, the Printrboard, Extrudrboard, up to three extruders, battery ready, huge build platform (`16"x8"x8"), 12mm rods all around... the list goes on.
One fun part is the steam-punkish handle and covers.