We had a furnace that broke down in the dead of winter, and I set about asking for recommendations. Grizzly kept popping up with reliable and positive reviews so I contacted them. Brad came that same day to take a look and set about arranging all the details. From his initial visit, to the subsequent days of work, all the employees were extremely professional, friendly, and explained things in layman's terms so I felt competent and understood what they were doing every step of the way.
We are very happy with their work, our new Navien combi unit heats our home and provides hot water on demand (and gave us back a huge amount of space in the basement!).
I would recommend Grizzly in a heartbeat, and am so glad we went with them.