Absolut unit of a creature, great bite force and its mega bite is super powerful, it can easly chew through bosses even alpha when properly leveled, i dare say even Dragon as it can go under its belly and can't be hit by the fire breath, though i'd suggest using Tickle Chickens still.

As for utility ? Its not that slow on land (around Rex speed) can turn on itself, and bite behind it, take this into account plus its sheer power and you got one of the strongest tame. Underwater ? Really fast and still within the strongest, can easly kill the strongest creatures and farm underwater caves. Finally you can shoot from its back, making taming easier.