Duraplane
I think that the duraplane is the second worst flying "trainer" that I have seen. I got one when I started out and it crashed into some trees on the 2nd flight due to interference. It broke and bad that I decided not to fix it. I got a Hobbico Airvista and have been alot more happy with it.
The worst flying "trainer" is the Hobbico Sturdy Birdy. A new guy showed up at the field with one powered by a Fox .40 engine. A .25 is reccommended to power it. He had a Fox .40 on it and it was very underpowered. It crashed on almost every flight. It didn't break, but I would rather have an airplane that exploded when it crashed, but flew well.