I loved legos as a kid and had them for as long as I can remember. Perhaps I've become jaded but it takes a lot for anything made of legos to really impress me.
CubeStormer did it! It moved so fast I wondered 2 things.
1. did they glue the legos together, surely it should fly apart at that speed?
2. did they loosen and lubricate the cube? (they did that for another lego robot I saw)
Either way it moves like a piece of expensive industrial equipment.