I thought I would put my 2 cent's into it since this is about the only think I know about so far.

I have the Arrow and am really pleased. it flies great right out of the box it took me about 25 minutes to assemble it and handles well for a trainer, I don't have alot of experience with this but with the larger ailerons it rolls faster and more controlled then some with smaller surface area trainer out there.
and it's really tuff....I lawn darted mine shortly after I solo'ed..broke out the fire wall smashed up the wing ( I think I used to many rubber bands on it) and broke the whole front of the plane.
with about $5 in wood and some time and glue I had it flying again that weekend even better.
the evolution engine is great it has a flywheel from the factory that allows it to run more smoothly and best of all for people like me that can't tune nitro engines it has stops so you can only get it so far out of tune. this is really nice since you cant get the engine so far out that it will cause damage.
and best of all it came with a simulator and training cord. so you can learn on your PC then not have to wait for some one else to get a buddy cord to train you.
all and all I wouldn't buy another plane to train on given a chance totally happy with the Arrow.