Unless if the mech and frame are strong enough to take the hit (which they claim they are), then all you've got now is a bent hanger you need to change which you wouldn't have needed to do, IF they are strong enough as they claim...
I've broken a couple of hangers by getting a stick or something caught between the chain and the lower pulley wheel. I wonder what will happen with these, looks like the cage is supposed to give and it seems to be easy to replace.
Unless if the mech and frame are strong enough to take the hit (which they claim they are), then all you've got now is a bent hanger you need to change which you wouldn't have needed to do, IF they are strong enough as they claim...