The only thing I have broke on mine was one front lower a-arm and one servo saver. I broke both parts at the same time, but I guess I have an excuse because I was going full speed (about 40 to 45mph) and hit a rock stuck in the ground. I didn't see the rock because it was covered in dust from all the other trucks running...
So you can't really expect nothing to break at that speed hitting a stationary object. But overall, I have had some pretty bad tumbles and crashes and it seems to be holding up great.
The only thing I'd mention is that one turnbuckle ball end pops off sometimes in crashes, but I just pop it back on and its good as new.
Rarely ever happens though.