Pittsextra,
Good comment, but I believe the actual piloting tasks and training "difficulty" is quite reasonable. I had a chance to fly the 609 simulator for a few hours, and frankly, it was a pleasure, and not very different than conventional helis. I felt the mix of controls and displays was the best I have seen in quite a while. The limits in the transition between heli and plane are clearly displayed, and the controls automatically keep the nacelle angle proper as you accelerate or decelerate.
I have heard it said the Powered Lift transition is easy, and the sim can help maintain currency in emergency procedures. The US Marines have little difficulty with the much more complex Osprey from a pilot standpoint.
For those who take my comments on efficiency of the type to be criticism of the type overall, I must say that I feel it has a distinct and legitimate place in our spectrum, just an expensive place.