I love brushless anything.
So the chance to have a brushless motor in my crawler at an excellent price was too good to pass up!!! US$86 posted is excellent as far as i'm concerned.
Installation in my AX10 was as easy as can be, the most time consuming part was waiting for my soldering iron to get hot enough to put deans connectors on...
The ESC fits in any small space, and the motor is standard 540 size.
Power it up and it works just like it should, enough torque to push my Scorpion over obstacles i put in its way. And programmable with the supplies card.
Easy peasy. Worth the money:)