The Mitsubishi MU-2B is a fairly high performance aircraft but also fairly old so takes a bit of skill to fly and has a history of biting those that are not well trained in its flight characteristics. The FAA requires special certification for this plane and although it can be flown by a single pilot it probably should be flown with two, especially if they are low hours pilots as it can get away from you very quickly in an engine out situation. Not a good plane for a week-end warrior and noticed that the guy has only been flying since 2009 so probably doesn’t have as much experience as you would want with this type of plane.
I’m pretty sure it was this type of aircraft that was the corporate plane of a company I shall not name; but if this IS that type of aircraft, I know a couple people at that company who did not want to fly in it because it had no bathroom — of any kind. Okay for a flight of no longer than an hour, and that’s with an empty bladder and no chili for lunch.