We had Comtronix install our security system and phone/paging system when we opened our new office. The fees were reasonable, they did a great job explaining everything, and obviously knew what they were doing. We're on our third year in the office and the system is still working perfectly. At one point, we needed to add another phone and change the location of one of the alarm triggers. They came out the same day we called, and took care of everything that day. Also, we had forgotten how to program the phone and wanted the phone system to wait longer before going to voice mail. We told them it was no rush, but they came out the next day and took care of that, too. These guys are awesome. Seriously recommended!