I have met several, and had many long chats with a rhod ridge owner and former breeder/competitor I know. With good breeding, the right early socialization, and the right home they are great dogs. With bad breeding, a lack of early socialization, and an inexperienced owner (or an owner who thinks 'a dog is a dog is a dog') they can be a disaster - unpredictable with both people and other animals. They are a high energy dog, but when well exercised and well trained, are couch potatoes indoors. They can be destructive when young/adolescents, perhaps more so than many other breeds of the same size - they love to seek and destroy.
At least, that is how my friend described it. High prey drive, VERY independent (teaching reliable recall is a challenge, especially when they are focused on a moving target like a squirrel, a cat or a car). Definitely a people dog - ie, need to be considered part of the family - despite their independence - sort of like a strong-willed child. On the plus side, her stories of his antics make me laugh out loud. Think Cousteau in a slightly different body. Of course, that is just my friend's dog.