I just installed the G90 on my CP+ , i took it up about 1ft for a hover check and WOW. The tail holds dead on, i cant believe how well it keeps the tail nailed down straight. I didnt get a chance to try forward flight (too windy out). Definately worth $85, feels like a new heli. My only concern is if it will wear out the tail motor even faster because of the constant speed changes made by the gyro.
I also didnt follow the directions in the manual, i turned down the 3in1 gain pot all the way and didnt touch the proportional mix pot at all. Fired it up and it hovered solid the first try, just had to turn the trim to the left about half way on the tx. Maybe the manual is just flat wrong like stated above.