Capt Jim
This plane was my first and I can say a very good trainer. It is solidly built and a great flier. Now, as to whether it can fail due to high G activities, I sure it is possible. I put mine through many acrobatic endeavors, not all of which were well done. It never experienced any kind of structural failure and survived three crashes to still fly today. It weighs quite a bit more now but I learned to repair as well as fly with it.
I would not hesitate to recommend it to a beginner or to assist someone in training with one.
Sunny_B