I will explain why ducted fans and pushers are much harder to fly then standard aircraft. Regular aircraft have the prop in front of the plane. This prop no matter what when it is running forces air back along the control surfaces providing the surfaces with some bite and modicrum of control at slow speeds. Pushers and ducted fans rely on movement through the air for this controlability. In other words they get logy and sluggish when they are slow and you have to be careful when doing stalls and think about turns that will not bleed off most of your airspeed. These planes really require you to have a lot of confidence and knowledge about their characteristics before then can be flown succesfully.