Good for hobbies since it's all in one nature makes it simple to use. Can handle some overvolting on an appropriate external controller. They handle 48v but I wouldn't recommend more than 36v. Easier than some brushless motors to rewire for change to CW(they ship as CCW) due to the easy hall sensor/phase wire access. For the same reason they're easy to wire for external control. $50 at ebay, Same here. I have 3 left.