While Flyduino's design focus is simplicity and ease of use, their products are feature packed and anything but simple in design.
Our favorite design features include telemetry output, the safe, self protection system and my personal favorite, the ability to change motor direction by simply bridging two solder pads together on the ESC; so much easier than switching motor wires or using a "pass through" firmware editor.
Many of us have had aircraft fall out of the sky because one or more ESC's overheated and went into "self protect mode". While the ESC's did save themselves, they also inadvertently destroyed other, more expensive gear.
KISS ESC's use current limiting to control ESC overheating, allowing the safe return of your aircraft.
Finally there's the telemetry. The telemetry from the ESC's can be displayed on an OSD or transmitted via S.port to your FrSky transmitter. Variables that can be monitored include, ESC temperature, RPM, current, and voltage.
Take a look at this list of features:
(**) For very long LiPo power lines (more than 20cm) or for smoothing the power supply, attach a 100–400μF Low ESR 25V (or more) electrolytic capacitor to the power pads. Caution! When used with 5S lipo, the use of a electrolytic capacitor is recommended.
(*) e.g. When mounted between two CF plates.
Here's a brief video review of this ESC...