I have an 8 year old male fila and his 3 year old daughter. He will behave in public but doesn't like it. She has made friends with people I introduce her to but she will stop them at the fence anyway. She can go visit and behave. I have trained a lot of dogs and these do take someone who knows what they are doing. I would never take them off leash, even when hiking in the hills. They will protect the family from all comers.
I live in the foothills and they are very aggressive when a mountain lion comes near the house.
I have friends with children and filas. The dogs are good with the children. But as with any breed, it depends on how you raise them (both kids and dogs).