Bull breed dogs are not great with other pets or any dogs you may meet while taking them out for a walk, although the english bulldog are better than most. From what I have heard they are good family pets, and mostly good with children, although as with all breeds, there will be exceptions. As we are experiencing warm weather (just for a change) it is worth mentioning they are extremely heat intolerant and a common complaint is dry eye and ingrowing eye lashes.
Dont let me put you off - I am very anti SBT's at the minute, they out number any other breed in my area by 5 - 1 and the owners either have them loose off the lead with no control whatsoever and they chase my dogs, or they are so aggressive they can barely keep them restrained.