I used this company twice. First to get a duct smoke detector installed. I got a few quotes and they were the most reasonable. I was a little nervous since I was only provided a rough quote through email - they asked the relevant questions and said it would be cheaper for me to get a rough quote by email instead of paying for a visit. Once Derek arrived, he worked very fast and was very focused on getting the job done, and the price ended up being cheaper than the quote! So when I needed interconnected smoke alarms installed, I didn't bother shopping around.. I got another rough quote by email and when they came, they once again came in at what they quoted and got the work done quickly and professionally. At both visits, they were very polite, professional and punctual. They are also ESA-certified, which gave me peace of mind. Overall, very happy with them. I even recommended them to my sister.