I have several AS3X planes including the VisionAire. I LOVE it! I find that it really makes a difference and keeps the plane locked in.
I don't fine it makes 3D or aerobatic ships "fly like a trainer" however. The still do just what I ask and just feel locked in. Pretty impressive and this will make some otherwise un-flyable planes and bring them potential.
I wish my UM Stryker had it. It made the small UM beast go from OK to awesome.
Hobby King has orange RX's out now too made for airplanes.