The plane does rip easily, and I've even had an aileron servo tear out on a landing I'd barely describe as 'hard'. But any repair I've done on the plane has taken 10 minutes at most.

I think Flight-Flex should be called In-Flight-Flex. The fuselage will bend or twist under moderately high rudder or elevator deflection, making most manuevers anything but precise. I flew it about 30 or 40 times before I felt like there were no more new manuevers to try with the plane.

Negatives aside, I did/do have a lot of fun with the plane (Yak). If you think of durability in terms of indestructibility, this plane is not durable at all. But if you think of durability in terms of resilience, it most definitely is. For example, after a wicked nose-in, all I had to do was hot glue the motor mount stick back in, straighten the motor shaft, and hot glue a few tears in the fuselage around the wings, and the plane was nose-up taking off out of my hand 15 minutes after it was nose down into the grass. If the same thing happened to a typical molded foam plane you'd be picking up and sorting through multiple pieces, same with balsa, and repairs would be hours, not minutes.

Because of it's resilience, it's the only plane I have that I'm not afraid to get way down low to the ground and try harrier's and hovers and stuff. Probably why I still have fun with it even though I feel like I've outgrown it.