It worked -really- good, After getting an EmaXX transmission and beefing up the suspension that is. With all that speed this truck is really easy to roll over, often times busting off some or all of the ball joints. I bought some metal joints, and made some custom mounting brackets for them since the plastic in the axles is weak and brittle. frigging fast though, really fast. and you can always set the throttle low with your TX for crawling (and soften your suspension, I used screw adjustable piggy back shocks)
http://img204.imageshack.us/img204/8441/dcp2874bg5.jpg