Uhhhh.... Oooookkkaaayyyy...
That thing looks like %@#&, especially on the inside.
Don't get me wrong - it's an accomplishment to build something like that, quite impressive from a design POV, but as an actual portable it's useless. Not because it's huge, or may have short battery life, but because the stick/button layout is completely different to a standard PS2 pad. How is one supposed to reach the shoulder buttons when using the D-pad/right analog stick? And there's no analog sensitivity in the buttons either. :? So, it's nothing but a curiosity, really.