FreeJump recommend that you replace them every few years as they wear out. Once they get replaced they'll be fine but you need to be prepared to keep buying more of them!
No in my opinion they are more dangerous than normal stirrups
I agree with Amber. I heard of some incidents where they break. They aren't worth the over $300 they are
I hate them :/ I've seen many accidents and things and they just snap when put under pressure.
I love my lorenzini's they've survived everything, including my horse having a rotational fall onto them etc.