Well, we did some testing of one of the units. It works great, no nasty noises, does all the right things as it should, like turning into the corner under power. It also took exactly the same shim as the OEM diff it replaced (not promising that will always be the case, but it's a good sign!).
I'll agree with previous reviews that it's slightly more agressive than a Quaife, which is pretty neat.
In a hard take-off with the wheels turned under power (both tires spinning), you can just barely hear/feel the Wavetrac centre pack and pinions working - nothing intrusive, noisy or abrupt - just working as it should. The Quaife is quite noisy in this situation, and it's also obvious that the Quaife is going somewhat open in this scenario.
Here are a few pics ... It works in a straight line:
http://www.shonutperformance.com/Straight_Line.jpg
It works on split-mu surfaces (equal slip on both wheels):
http://www.shonutperformance.com/Split_Mu.jpg
And it even works taking off hard with the wheels turned, no nasty noises or steering inputs required, just steer where you want to go:
http://www.shonutperformance.com/Around_Corners.jpg
Needless to say we are excited, and can't wait to try one in the winter!
We will be taking full payments soon for imminent delivery (as well as continuing to take deposits for those that want to hold a unit).
Thanks!