Well, this has been my experience with the copilot. A student of mine had one on his plane, and i ended up having him turn it off when he flew with me for one reason... it wanted to control the plane it caused it to fly different then when it was turned off. For example, without it... you'd enter into a turn, bank the plane, and then let off the ailerons and switch to elevator. Without the copilot, the plane would stay in the bank. With the copilot turned on, you had to be very careful in the turns... after you'd let off the ailerons in the turn, the copilot would cause the plan to level back out. To correct this, I had to hold ailerons throughout the entire turn, and the student had a hard time finding just the right amount of aileron to hold without banking it too far.

The one thing I'd recommend to use it for is take off and landing. if you have a 6 channel radio, you can control how much the copilot will correct the plane. So after you take off, turn the copilot off. And before you land, turn it back on.

One other funny thing, with the copilot turned all the way up, the plane was almost impossible to turn. As soon as we'd let off the ailerons, it would balance itself. Even holding the ailerons it wanted to balance itself.