We had a small amount of water in the pan under our water heater. I called Hardline and spoke to Justin on the phone. He was very friendly and helpful, and I was able to setup an appointment with Frank for the next day.
Frank arrived at the expected time, and was friendly and thorough in his inspection of the problem. After running through a series of checks, he found that the problem was that the drain valve was not completely closed, and had a slow drip, which he closed and capped. It was nice that is was such a simple fix, and that there wasn't any attempt to mis-characterize the problem or try to up-sell things that weren't needed. The cost of the service was their diagnostic fee plus the cost of the drain cap, which was fair.
I asked several additional questions, and Frank was patient and helpful in answering my questions - I didn't get the feeling that he was just trying to rush out after the job was complete. He also took some time to point out and explain several other potential issues with some outdated/lower-end plumbing installations we have, which I appreciated. I also asked for ballpark costs for various repair/replacement jobs, and he give me detailed answers on what various jobs would cost, but it felt more like an informative conversation than a sales call.
I can't speak about having major work done by Hardline, but I felt that they were very professional and friendly in a smaller diagnostic/repair job, and I would plan on using them for future jobs, big or small. I don't normally write long reviews, but I've had mixed experiences with plumbers/contractors/etc. in the past, so I wanted to leave a positive review for a company that seems to care!