I broke 6 of the old design ones....they do not break on their own but if you crash at certain speed and angle they will snap off. New yokomo ones with C clip so far no issues. I also have the CSO with C clip they are half the price and in my opinion are just as good havent broke on yet. I highly recommend the CSO for the price.
2014 and 2015 BD7 Black Series, Yokomo RPX ESC- Yokomo 4.5T Motor
Yokomo B-MAX4 III Factory Team Kit, Muchmore ESC- LRP 6.5T Motor
Mugen MBX7R Eco- 2200 KV Motor