I recently hired Quality Refrigeration Services to do an installation for smoke detectors for me. I have used the company before to do work for my furnace and overall maintenance. The technician that I worked with for this recent job was a bit hard to communicate with. I discovered that after the smoke detectors were installed, that they weren't dated and they could have been. But the most important thing is that they are up and working fine, and I trust that they are good for ten years. I'm still extremely pleased with Brian and his company as a whole, so I would recommend the company to other people.