We have a gas fireplace that wasn't working properly (it would shut off on its own). As well, I felt that it needed a general service.
I called Fireplace Gallery and have to admit that I wasn't overly impressed with the service. It took three visits before the problem was fixed properly. I won't name who came the first two times but I don't think he knew his stuff that well. As well, he only did a cursory cleaning job. The fireplace still didn't work right after he came twice and Fireplace Gallery had already charged me the full service charge (without my knowledge or permission). It bothered me that they did this.
I eventually spoke to someone in the service department who was better and he sent someone who seemed much more knowledgeable. This second service technician diagnosed the problem quite quickly and was able to fix it. He also did a more thorough cleaning job.
Thus, this is a bit of a mixed review. I would try Fireplace Gallery again, but only if I got the second service technician.