"Home Security Store was excellent to deal with initially on a $1500 system that I purchased. Within 5 months the battery (an upgraded unit) failed and they would not stand behind the product. No warranty on a battery that should last 4-5 years. Very disappointing in their willingness to stand behind what they sell and dismissive customer support. I am starting a new business with multiple locations that all will require full security systems. Guess who will not be getting thousands of dollars in business over a $22 battery?"