I have purchased 20 of these for my 4-cell multirotor builds (2 Hexa's and 2 quads) just in the last few months. I fly the DJI Naza-M as well as KK boards on my machines and these ESC's have performed fantastic!
I did have 2 that were DOA which I plan to return/exchange this week. However that can happen with any product.
Overall, I am throughly happy with these ESC's and would def recommend them.
Eric Monroe from Ohio
Don't use with MT4006-13
Looks to be a high quality ESC, quick shipping too. However, I purchased these for the high refresh rate to use with Tiger Motor MT4006-13 740kv pancake motors (on a QAV500 frame). These ESCs don't work with this particular motor. Tried two FCs (APM2, latest 2.9.1 code and Wookong M, latest 5.2 code). Motors spasm, pulse loudly and destabilize after a few seconds of flight, broke a few props testing this one.
john seaman from Cali