The "Moo Too" has a poor reputation in some circles because it is demanding of good handling and strong instrument flying skills. The majority of those who bad-mouth the airplane have never flown it or been trained on it.
Almost all of the crashed airframes were flown by pilots who did not have proper training on the type and got behind the airframe. Like many other aircraft types, there is a number of accidents where people just do dumb things regardless of the name of the manufacturer on the data plate or are just in the wrong place at the wrong time....the "Fate is the Hunter" syndrome.
The acccident history has depressed the value of the airplane and as a result the type has ended up in the hands of some commercial operators and private pilots who fail to maintain it properly or fail to devote the time required to stay highly current on type.
One other thing to never ever take lightly is the Negative Torque Sensing (NTS) System. It puts the prop on the "Dead" engine into partial feather so the airplane will be controllable while you do the SE drill and do the cleanup drill. Don't EVER fly the airplane with the NTS system U/S and maintenance test flights on the system can be very "exciting" if it isn't rigged correctly. A faulty NTS can kill you and I don't care if you are the best stick handler in the world.
The "typical" MU2 accident is landing short of the runway in a very high sink rate with power retarded. I was lucky enough to fly the airplane for an operator who was very big on training and went to Flight Safety International on a regular basis for 8 years and learned a lot from the sim instructors. At the time, FSI was the only company authorized by Mits to provide type training.
In my inital airplane checkout after sim, during night approaches the training pilot had me pull the power back at the FAF and told me to look outside at the runway for about 30 seconds then look back inside at the VSI ... it was pinned at 4,000 FPM down and felt as solid as if the plane was sitting on the ramp with the chocks in place. That was an eye-opener.
The plane has some peculiarities worth noting. The high idling Garretts have next to zero perceptable sound change with power changes thoughout their power range, and due to the high wing loading the plane feels solid all the time. If you are coming off a light piston twin you'll find it to be a very different animal than you are used to.
All trims and control inputs interact with one another ... sort of like a helicopter. Changing anything causes it to change something else You'll be trimming, trimming, trimming and then trimming some more whenever you make the slightest power change. Noel Springer, Chief Pilot of the FSI MU2 program at the time said "If you even so much as change your mind, you'll have to retrim."
The MU2 will fly you around for the first 300 hours and you'll feel really behind what's happening .... then you'll start to fly the plane rather than the other way around.
One of the times I was in Houston at FSI, an MU2 had crashed near Dallas the night before. We were speculating as to the possible cause and one of the senior instructors said the pilot had died of "Hub Disease" ... I asked what the heck that was and he said "HUB stood for Head Up Butt."