The in-built breaking would cause problems for a robot, would it not? E.g., drills often favour one direction over another a tiny bit (at least in my experience), meaning the robot never drives quite straight until you fiddle with trims. The problem I had with Tormenta was that, one side of the drive would stop before the other, meaning I oversteer or just the steering in general is a bit funky, unless I keep the power on and drive more binary-style. It made driving slowly in a straight line almost impossible.

With breaking I can see that characteristic might be worse. If you're turning in a wide arc, once you come off the power the inside motors will break a little sooner than the other side, spinning you round in that direction, right? I can see that actually not aiding the driver, but making things worse, if anything?

I am really very tempted by these ESCs, though the Electronize have done us well and after 2 years they're still good as new. If they're not going to be perfect, though, I can't justify the money, even if they are remarkably cheap.