With the weight/wing loading of these plastic cardboard planes, they have to be flown with authority. People learning how to fly need to learn slow and graceful flight, easy turns, and slow landings not only to build their flying skills but confidence, not to mention reaction time for when they get into trouble.
Like I said in a earlier post, I have never seen one get any higher than head high and as soon as they left the ground, the fight was on between the pilot and his plastic plane.
Any high , flat bottom winged plane "balsa not heavy plastic " either 40 or 60 size would make a better trainer than the aircore trainer in my opinion.
It will frustrate a new pilot enough to give up the hobby before he/she has began to experience it. I have seen it happen.