I've raised enough (foundation dogs) to form an honest opinion. The first one I raised I was honestly impressed with. He was not perfect by any means and had his faults (extremely rough and male dog aggressive to name a few) but all in all he was a solid dog. The next two after him were sorry as could be. Said and done, I got rid of all the ones I had and stayed with what I've used for years. I never found the range that I like in Foundation dogs.
Be leary of anyone who claims to not produce culls. Be leary of anyone who doesn't use the dogs they are breeding for the purpose you are wanting them. Be leary of anyone who breeds on pedrigrees alone. Be leary of anyone who claims to breed a dog that will suit everyone.
My .02
I have seen enough to know I won't own one...there are good dogs in every breed of dogs used for hog hunting...and some breeds and strain have a higher cull rate and that is all I have to say about that...I have seen Wrights Cur advertisements way back then...and it was too contradictive for any one dog to be that good...sounded good but no one dog can do what he advertised no matter how good a dog...