Recent Review: Wow, where to start. Delta mechanical is contracted through the Costco water heater program. I noticed one of the program brochures while shopping at Costco one day and gave them a call. They offered a number of water heater options. We chose a tankless unit and scheduled the install. One interesting thing about this company is the installers cover a very large area, so they often drive long distances between appointments, so in my experience the appointment windows are more like general guidelines than set time windows. This was challenging when I was scheduling work at a house we had just bought with no furniture yet and trying to entertain my two toddlers while waiting for the worker to arrive. At a later appointment I even found out the worker wasn't really scheduled to come even though the office said he was. In any case, that first appointment the worker did arrive and installed the water heater. He ended up working past dark installing the water heater along the outside of the house since he started so late in the day, probably due to a long drive. Anyway, I also had to come by late at night to sign the paperwork and make my payment. As soon as my husband saw the water heater by the light of day, he could tell there were problems with the installation. We called the company. They wanted to wait until the city inspected it, but there were such obvious issues that they gave in and scheduled the installer again. Eventually the installer came and made fixes. Then we scheduled the city inspection. Inspection found five findings they still had to fix. Installer scheduled and rescheduled and made fixes. Delta paid for the additional inspection time needed. Then city inspection passed. The water heater installer had made a large hole in the stucco of our house where he put the water heater. A really large hole, several feet high. Once the inspection passed, we got a quote from a handyman for the stucco repair. He was incredulous. Never seen anything like it. The water heater would need to be taken down and the stucco patched behind it to keep water out. Thank goodness we hadn't had any significant rain in the months between the install and that point. We communicated with Delta customer service, which was actually quite good, and they agree to pay the stucco patch cost. Return Delta installer to take down water heater. Follow with stucco patch and cure and nearly a week with no hot water. Again return a different Delta installer to put back water heater. The real kicker came when the different Delta installer came to reinstall the water heater. I was actually annoyed at first that the main office refused to schedule the same installer from all the previous visits since he knew what was going on, but it was a blessing in disguise. The new installer saw the size of the stucco patch and was just shocked. He said he had never seen anything like it, that there was absolutely no reason to cut a hole like that. He proceeded to quickly install the water heater without any significant stucco holes. Oh, if only he had been the installer to come out in the first place. It would have been so much easier. Overall, I have to give the customer service department kudos because they were really helpful and did pay for the repair. (Though the main customer service guy did leave the company in the middle of handling my case, not sure if that was completely a coincidence.) But seriously, they might have lost money on my install. If the company just assigned installers jobs they were qualified to do, everyone would be better served. Personally, I wouldn't chance it again with this company.