Not a Corso owner here (yet), but definitely interested.
I had been researching them for some time but, with an apparent extreme variation in size, temperament, energy level, protectiveness, health issues, etc, I still haven't got a solid feel for the breed (of course, can be said for many other breeds, as well).
Also, from what I gather, good breeders are few and far between (and this, too, can be said for many, if not most, other breeds).
I, very much, look forward to the learning experience!