This is going to be an odd review. We ended up having a misunderstanding and things didn't end on a friendly note, unfortunately. But as you can see by the star rating I was satisfied with the work done.
We had need of a plumber after our water heater failed. OMW was recommended by a contractor I trust. They helped me secure a good water heater, and also installed a pan with drain line so hopefully any future episodes with the heater will direct all the water outside. OMW was responsive, and we were scheduled reasonably quickly once the water damage in the area had been addressed. No complaints about the work, nor the serviceman (Richard) who came out. Richard worked well past "quitting time" until the primary job was done.
A follow-up call was needed because we wanted a drain for the second water heater, and it was so late after he had installed the unit that I told him to just go home and come back some time in the future. When he did come back to install the drain he left an invoice. I was confused because I thought it was part of the original agreement, but I did not have it in writing (searched my emails extensively). Given this fact I called to give my credit card number but was told to forget it.
What really sucks here is that I think I found a reasonably-priced and responsive plumber who probably won't want to deal with me now!! But I can't take that out on them, so I have to give them four stars. I can recommend them based on work and pricing.