That picture looks more like a young mastiff than a pit, except for not having a black mask. Click on my screen name to see mine (he’s grown now, much larger).
Tht's our baby Swiper, he's a pit bull/red heeler mix. When we first got him, he was a hard case. He'd never lived inside a house before, and threw 'pit fits' daily...His pupils would shrink to pinpoints and he'd race through our tiny house, knocking over furniture, kids, whatever was in the way. He ripped up carpet, toys, shoes, my arms...80 pounds of crazy.
Once we figured out what kind of lifestyle he needed, he calmed down and now I can't imagine life without him. He hasn't had a freak out in months, and he's wonderful to walk with. Never pulls, unless he's in harness.
Although I must say, if I had the resources, I'd have a mastiff like yours. He's beauuuuuutiful.