Unfortunately some gravel from a renovation found its way into our sewer line that effectively backed up our waste water. Drainworks was quick to show up and diagnose the problem with a camera inspection. At a cost of $278 this was very expensive given other companies, I've since learned, will do it for $50. they came back the next day to excavate the clogged pipe just outside our house and replace it with a new one. The workers were curteous and efficient, doing the work in less than a day.
In an emergency situation, where cost is less of a priority, I would use them again. However, if you have the luxury of time, it would be prudent to get a couple other quotes.
**DISCLAIMER: Drainworks offers a $20 cashback incentive to its customers for writing a review on Homestars. It does not specify that it need be a positive one.