I've owned GSPs since 1989, bred, trained, showed, trialed, but mostly hunted and loved them. Mine were absolutely reliable with people, unless those people weren't welcome. Wonderful family dogs and guard dogs. As many have stated, they need room to exercise. The vast majority I've been associated with had good to excellent noses, and strong natural pointing and retrieving instincts. Probably 60% were natural backers. Most were medium to big running dogs. I've owned some very well bred high dollar pups. The best one I ever owned was my first GSP, a back yard bred hot ticked male who died about 5 years ago. Every hunter who owns bird dogs is due one great dog. Tucker was mine. There will never be another quite like him.
