I say good. Our house was broken into when my brother's GSD was 5 months old and ever since then she's been incredibly protective of the house. It was like a switch went off that day. We've been working with her, but in order for anyone to be recognized as family or friends they have to play ball with her in the backyard first. She associates tennis ball as friend. So although your dog won't be deterring robbers (which it doesn't sound like you need most of the time), I'll bet he's really great around all sorts of new people and easy to take in public.