Love em, fly great all the time, no issues.
Flyduino KISS 24a ESC v1.08+
The KISS 24a ESC is the latest evolution to come from the mind of Felix Niessen, who brought to the world of mini quads OneShot, regenerative braking, and a super smooth, high resolution feel to flying. It continues the Keep It Super Simple design philosophy by not requiring constant FW updates or any parameters that need changing. The only variable is a solder jumper on the PCB which changes motor direction. All other parameters are done automatically by the FW which includes auto adaptive timing. OneShot125 and OneShot42 are supported.
The KISS 24a ESC was primarily designed for the 4s, 5 inch size mini quad and has been designed with bulletproof durability in mind. Over current and over temp protection ensures you will not be starting fires when you push things.
Another very handy addition is the ability for the ESC to deliver various telemetry features back to the KISS Flight Controller which can in turn pass to an OSD or radio link telemetry such as the FRsky S.port and will allow data and warnings to be displayed on your Transmitter. Stats such as voltage, current draw, mah consumption, motor RPM and ESC temperature are possible.