Flew the Barbie Jet in Air Force UPT and probably have about 120 hours in it. We did stalls, slow flight, unusual attitudes, steep turns, tactical VFR patterns, even flew formation in the thing and although the controls were heavy in the roll axis having just spoiler, I didn't think it was unstable. It was challenging to fly. For the first few months we weren't allowed to use autopilot, so we hand flew the damn thing everywhere we went. Got quite tiresome. It was a fun jet to fly. Got the BE400/MU300 type out of it. Maybe I'll use it someday.