Just had a quick play - thoughts so far:
Unlike Butuz's which has contra-rotating rotors & hence I guess relatively little torque effect the Dragonfly from Aria has very noticeable torque.
Also with only 2 channels you effectively have collective & pedal control but no cyclic.
On my limited efforts so far I don't think that I would recommend this for flying in the house unless you have a large room with nothing in it. Maybe my views will change after more practice but for now I think that I need to find a field & put in some practice.
Still at 1/3 of the price of Butuz's I'm sure that my nephew & I will get some fun out of it.