I feel like I can trust the work they do
At least I know that the people at Duncan Plumbing are honest and do a good job. I've had several things done recently by them, including an old soft water system that needed to be removed. It had all this complicated piping and he did a great job hauling stuff away, fixing the pipes, and making sure the piping is flush with the walls. I also just had a new water heater put in and they did a great job on that. And, on a rental I have they put in a new sewer line and did a great job there.
They have quality work that's done really well all the time. The guys are really courteous, very friendly and informative--and I enjoy talking with them because they are nice guys. They come right out when I need them, and the ladies in the office are great. Anyone I talk with there, they are always really receptive and jump right on it and line something up. Their prices are a little bit high but, honestly, I know it's guaranteed-quality work and I'm fine with that.