I've got time in a few different Models (F, L, N, and P) They aren't especially hard or tricky to fly. Where people get into trouble is that they try to fly it like a convention piston twin, and the MU2 is anything but that. You really have to fly it like a jet. As long as you go for formal initial and recurrent training, stick to proper procedures, you will be fine. It is a very tame airplane even single engine. Most people that bad mouth the airplane have never flown one so consider the source. However, the F model is kind of a POS. Underpowered, many have crappy panels, etc. We have an L model right now and had to take it off of Part 135 because we couldn't get high enough liablity coverage per seat on the insurance. PM me with any question's you have and I'll see if I can answer them for you.
EB