This is an awesome breed. They are gentle giants. Wonderful with children, protective of family, a bit wary of strangers, good watchdogs. My aunt & uncle had a dairy farm in New Hampshire, they had 4 of these dogs on their property.
In addition, I once fostered a male 5 month old yellow lab / great pyr mix and he was 55 pounds already at that age. He had the fluffiest white coat and most awesome personality.