It's not bad. The motor they use has a TON of power, with the right ESC that motor kicks serious butt. If I'm not mistaken they have changed to the EZ-run esc though, so it's not the big bulky HSP Esc. I have one of those motors on my Team Associated B3 and I paired it with a Castle Creations SV2 ESC so I could control setup the power curves through the Castle Link Program. Otherwise the motor has so much power it just makes the B3 do a standing back flip and that's no good on take off when you race, lol. The one thing I did notice about those motors is is that the Shaft is soft, it doesn't appear to be hardened steel. Which really isn't a problem unless you put the motor in a Duratrax car and launch it 30 feet in the air and land on the back of the transmission.