Seriously, the Castle Creations products are excellent. My first brushless system for my B44 is a Mamba Max with the 5700kV motor. I was so impressed on the sheer power and how rugged it was (never had it thermalled, and I remind you that the innards of my B44 is sealed with the body and undertray).
I was so impressed by this system, that I bought ANOTHER Mamba Max with a 4600kV motor this time for my other 4WD buggy, the DF-03MS...
Never had any problem with this system. Just make sure to update the ESC with the latest firmware off of Castle's site, and start fidgeting with the settings until you have a setup that's right for you.
For me, I use 30% drag brakes, no traction control, and motor timing to the "lowest" setting for the 5700kV setup. I set the timing to "low" for the 4600kV. Even setting the timing to the lowest on the 5700kV, I have NO PROBLEMS clearing triples and other obstacles. A blip of the throttle at the last minute is usually enough to clear any triples at my local track...
RIP TAP RC