the only gotcha seemed to be ice...just fly them fast 160kts+....to keep the ice off..
Sorry to flame you, but it doesn't really sound like you know what you're talking about.
Please explain how it's the only gotcha, I have several years experience on all models in serious winter conditions, it's no more of a gotcha on this aircraft than any other, I have had ice formations extending forward on the spinners over two feet long.
The airplane was very typical for something equipped with pneumatic boots, if you try inflating too soon, your going to scr*w yourself. Fly fast, you mean like using this on final? I hope you're kidding.
The MU2 is very straight forward, it worked quite well in heavy winter conditions in Montana and Colorado, the only gotcha was making sure the ignitions were on when descending into the warm air, like so many other Garrett powered aircraft.