Cupertino Plumbing installed a water heater for me and they did a good job. My only issue with them was that the first time when the guy came in to estimate what it would be, he told me would call me at nine the following morning to let me know the details. Well, at nine the next day, someone just showed up to put it in and I wasn't quite ready for that. However, it worked out fine in the end and I was happy with their work. Their pricing was a little on the high side, but they had to add different types of piping and stuff, so I think it was pretty good for what they did. Their technicians were professional and competent. They were communicative and explained what they were doing. This was my first time using their services, but I'd call them back if I ever needed.