I don't have very much expierence flying them (think like 11 hours), but from what I have been told, the problem with the aircraft is when someone tries to fly it like a normal twin such as a baron or king air when you loose an engine. One of the guys I flew with told me you have to fly it like a jet, because the wings only have a surface area a little larger than a 172 (or so he says), and that if you loose an engine on takeoff you don't retract the flaps until a very safe altitude because that is what generates most of the lift.
But take what I said as a grain of salt.