Gyro stabilizers in fixed wing A/C.

[rayspan]

Has anyone used one of these devices in a R/C plane? How well do they work?

In particular, the Piezo Gyro's sold on e-bay.

How are they applied, just for rudder/aileron control or more extensively?

Do they make much difference to flight performance?

I'm getting (got) ancient and reflexes ain't what they used to be, hoping this gadget will roll back the years a bit.

Be grateful for input from anyone out there.

[rcminiman]

I would use them on aelirons to level the wings, but you could use 2 of them and get elevator assistance as well.
The other good item out there is the FMA co-pilot. It will take the plane to level flight every time you release the sticks. Its more expensive, but will work a treat.