me and my gf have one, 2 years old this december, it is one deadly dog with stray people. it hasnt attacked anyone mainly because it will stop on command if told too but if unwatched and untrained it can be deadly.
when he was almost a year old, my gf was having a bday for her little sister, a bunch of 11 year olds running around, he was very gentle with kids, smaller humans. he saw a father and son play wrestling and he walked over there and tried to protect the kid from the dad thinking he was being hurt or something.
he comes up to my knees and im about 5 11" but hes jumped on me playing and knocked me down with ease, they are STRONG AS HELL. awesome dog, if you know what your doing they can be the most obediant dog you can ever have, but ive been told they are very protective...
gl and have fun with it