AJ from CERTIZONA responded to my immediate need to turn off and replace my smoke detectors that were malfunctioning and continuing to be in alarm mode. They responded same day and fixed the problem with an hour of their arrival. The problem was so severe that I was forced out of my home until they replaced all the detectors. AJ was pleasant, professional, and very personable. I highly recommend CERTIZONA for any fire and safety needs. That is why I gave them a 5 star rating.