yeah, it is pretty chunky, but not massively heavy. comes with it's own charging station too!
I'll have to get more pics up of my kart next time I take it out. the steering wheel is particularly interesting. it's got one of these fitted:

.. which is uber cool. it has a sensor on the floorplate which actually reads the magnetic split loops on tracks and gives you splits & full lap times, plus engine temp (using a sensor that sits on the head), RPM & total run time for the engine.
not as cool as the '
mychron 4' though - which has in-built GPS datalogging, so you can view your laps in real-time after a run. bonkers