Once it has been activated, the Fureau Fureau no Mi has no chances of failure. Not even the strongest Busoshoku Haki can protect you from its effects. Also it is quite possibly the most versatile Devil Fruit ever. Its versatility is so great, that it isn't a matter of what the consumer can do, but rather of what the consumer can't. Once the consumer discovers the few things he or she can't do, then he or she can proceed to explore the myriad of possibilities which lie before him or her.