I've used Citywide Sewer & Drain four or five times now, and they always provide immediate service. When I call they talk to me right away, and send someone out as soon as possible. You never have to wait two days for them to answer a message. Plus, they give me such a good price.
The biggest thing they did for me was fix my sinking lawn. There must have been an old cesspool underneath, and it was literally caving in. Citywide dug it up, fixed the problem, and put the grass back down on top. You could hardly tell they had done any work. They worked fast, didn't leave a mess, and though I was expecting a crazy bill, it wasn't bad.
I've used other plumbers and they have never been as good as Citywide. They get it right the first time--you never have to call them back. They are courteous and friendly, too. I definitely recommend them.