I had an Aircore Colt 40, and it was simply the most fun I've had with an airplane. It was slightly heavier than a balsa model, but for the type of flying I did with it it was perfect. Over the years it took quite a bashing. I couldn't get it out of an inverted flat spin one afternoon, and it slammed in pretty hard. 10 minutes later I was back up in the air again. It tumbled better than any sport model I've flown. Knife-edge spins were a favorite of mine with that. I finally killed it two years ago with a figure 9. Broke the wing spar, and I just figured it was time for it to be retired. One of these days I'll pick up another.

One thing I've noticed is that you have to be very careful when assembling an Aircore wing. If you don't pay attention to what you're doing you'll end up with a wing-warp.