Seen the mal x's run, and i'll tell you what, they were some seriously underrated dogs. They reminded me of wolves in a lot of ways. Faster than you would imagine, bags of stamina, very strong, very biddable, smart, hardy, good feet, good coat, intelligent and a very nice, friendly and lovable nature. I'd have one in a shot.
However i think it has been very much down to the mal bitch first used, and the knowledge and effort of those involved in breeding these dogs. I'm sure if many folk tried a repeat, they would end up with potlickers.