This mixer was working great for me during all of the testing of my robot at home, but on the day of my competition during my final tests, it spontaneously failed. I couldn't tell what had happened at the moment, but after disassembling everything, I found a scorch mark on the chip of the mixer and could smell burning. Repeated testing showed that no voltage was able to pass through the mixer anymore. Nothing else in the robot was harmed, and I was running the mixer with a galaxy 3S battery at standard values. I'm unsure what went wrong, but I'm hoping it was just a fluke.
[FTR: Sounds like power was plugged in backwards at some point. Our tinyESCs have protection against this, but not tinyMixers. Email support and we'll get you going.]