I did the majority of my PPL training on the Katana DA-20 and i found it to be a little GEM. Obviously you do not have the size and the "heavy" feel of the warrioir, but it really is no more than a glider with an engine.
One thing you will notice is that huge canopy which offers excellent, all rouond visibility. The control stick between your legs is a doddle to use and once trimmed and set up will fly dead straight and level for hours. (p.s. the stick is in a awkward place if you have a large knee board).
Once thing you need to be carefuul of is the steering on the ground, it is not steered by conventional rotating front wheel, but by differential breaking on the main wheels, alittle tricky at first, but like riding a bike, you get used to it.
It is a fun aeroplane to fly, even with two heavy people and fuel the planes performance is adequate enough !
I enjoyed my time in the DA-20 and would look forward to the new Diamon Twin coming soon.
Regards
Spitfire747