They cost 1200 dollars per piece. You are aware of that?
They say they do not sell to private customers (as was quoted by someone at the stealbeast.com site). It doesn'T matter if you are aware of the above!
I assume they would add a lot of precision, since they work differently than a flight yoke. Although one axis is like that of a car wheel, the other axis makes the grips being turned so that the movement is towards or away from your body - this controls the vertical axis. You understood what I mean? English is limiting here, I realize.