I couldn't have asked for a better dog than my mastibull Reagan. Ever since he was a puppy he was very easy to train and obedient. Training was never an issue with him, he was quickly potty trained and learned commands very quickly. He's amazingly gentle around small children, children younger than 7 years of age are at our home constantly and he let's them hang all over him. While very protective of his home and family, he has never bit or even niped at anyone, even when he was a puppy. Since he is a guard breed, he's very protective of our home which has a large fenced in yard. He let's almost everyone who walks by know who's yard it is! Our Mastibull also is constantly on alert. Reagan religiously checks all the rooms in the house and all windows (we have a large old home with 40+ windows) at least once a hour during the day, and gets up every few hours at night to check the house for anything out of place. On to his appearance, Our mastibull took heavily to the mastiff side of his genes. While not as tall as a standard mastiff he's still built very large. He weighs around 115 pounds and is still growing into his body. While very large, he's very athletic and quick. He manages to get from the back of our large yard to the from in a matter of seconds. He has a fawn coat, very large head, and a very muscular and intimidating frame. Overall, I couldn't ask for a better combination of a loving family dog and intimidating protector of his home and family!