This service seems to be there for you in your time of need. As needing a plumber never seems to happen conveniently, it is good to know one is close by and available and efficient.
Aside from all that, these people are able to relate to the humanistic side of the business, and keep their customers who are waiting for them informed of their time-line by up-date calls to let one know when they will be getting to your site. I find this kindness very valuable during a stressful "Plumber Needed" time.
Their preventitive maintenance adivce is helpful aftetr the problem is fixed, as well as their up-to-date sewer camera inspection, so you can really know just what is going on.
PROS: Excellent service provider!
CONS: None I experienced.