The master plumber correctly identified, and resolved, a number of challenges in our asymmetrical basement and tricky shower stall. He installed both rough plumbing and tricky trim; and reconfigured drains and low pipes in the ceiling. You see what you are paying for.
He also fixed a botched installation of a sink, solved our laundry room drain problem and made an emergency repair to a ceiling pipe nicked by a lighting installer.
Tens months later, our basement is dry as a bone, and the kitchen, bathroom and laundry room water and drains run perfectly.
I did not expect such attention to detail, and patience in explaining the art and science, for the price we paid. If you think A-Z's quote is unreasonable, I suggest you have not researched enough.