I had a problem with my hot water tank. I called Dion's and he came by the next morning. As luck would have it my tank started working, so he didn't need to do anything. He didn't charge me anything for the visit (he even had a helper with him) and even gave me the number of the AO Smith service guy. He was very responsive and an all around nice guy, so I would not hesitate to call him in the future for my plumbing needs.
See my comment above.. Dion was quick to respond and honest.