Although it's certainly not the first robot to take advantage of gyro sensors to maintain its balance, the MANOI AT01 robot from Kyosho turned out to be surprisingly stable. The robot uses Kondo servos and the RCB-3 controller board with 3 available analog servo inputs. The analog inputs can be used to add functionality to the robot with a number of different sensors.
Like most robots in this classification, sensors are add-on options and need to be ordered separately if owners want to take advantage of the performance enhancements. Thanks to Sugiura-san and the Sugiura Family, we were able to do a side by side comparison between a MANOI AT01 robot equipped with gyros and another robot without gyros. The video below clearly shows the performance improvement.