Superior was not dependable.
I had a major leak to the main line from the meter. They promised to show up during a window from 8am-12pm. They never showed up. It turns out they had failed to inform me of their policy that they will not honor the appointment unless they establish phone contact first.
Superior is gigantic, and because of that, they have policies like this to protect themselves. That protection is at the expense of the customer. (And of course, they would do well to inform their customers of those policies).
Plumbing problems can be a disaster, and you need a dependable plumber in such a situation. So you are far better off ignoring giant companies like Superior with giant phone book ads, and asking your neighbors for a small, local plumbing outfit that will actually show up to do the job.