I met and spent time with several Boerboels when I was in South Africa and Zambia. The ones I had contact with were well socialized and made great family pets, trusted to watch the home and the children. They were intelligent, sensible, calm dogs who weren't upset to have a houseful of strangers around, talking and laughing, coming and going.
They do, of course, require responsible ownership and proper training/socialization.
From what I've seen, some American breeders seem to be busy beefing up the breed, making them heavier. I personally prefer the South African standard. As far as I know, the dogs do not have any pit bull in them, although perhaps some people may be mixing them now?
/VM