We got ours from a Tennessee breeder whose dogs are known for protection sports. Ours is a mixed bag. She is neither aggressive nor affectionate to people, and is about the same with dogs, although she is very food protective around our other dog. She is pretty big and powerful and I had to use a prong collar and will probably be moving on to an E-collar for remote correction of some things like staying in the yard. She hasn't been hard to train, but hardly self trained. She would have been better off as a police dog or Schutzhund dog, which is what she was bred for, and not the family companion we needed. I totally understand looking at these breeders because they are good and in the area, but I really wish there had been a reputable breeder in the area that specializes in companion, family GSD's with less drive and a more affectionate disposition. So I don't blame the dog for being the way she is. If I had it to do all over again I probably wouldn't do it unless I specifically wanted a dog to compete in Schutzhund.