I recently bought two. One is in a Tamiya M05 with a torque tuned motor. In all 3 qualifiers and the 3 finals at my last meeting it went into limp mode whilst doing the warm up laps. In the actual runs it only did it once on the first lap of the last final. It never did it off the line ie stationary to full throttle, really weird. Never once had an issue with my ancient tamiya esc. Every time if I just sat for a few seconds it then seemed to go back to normal

The other one I put in a TT01 with a team powers brushed which is quicker than a torque tuned and I presume more power hungry, only gave that a couple of runs but no issues.

Going to put the M05 one into nimh mode and wire a cap in if it does it again, if that doesn't work then it goes in the bin. I wish I had researched them first as there are so many reports of it. I just bought them as I wanted a cheap waterproof esc with lipo protection