I have been an Ackerman customer since early 2010. It is qualified personnel such as Bill Holman who keep me coming back. Bill always has suggestions for additional protection of my home. Some of these suggestions do not include the purchase of equipment and are greatly appreciated. When I purchased my system Bill suggested that I install the digital keypad. This keypad tells you who has entered your home using a special code assigned to them. That's when I learned that my Maid service was overcharging me for the time spent. Needless to say, they no longer work for me. If it wasn't for Bill I'd still be paying. Thank you Ackerman for such qualified individuals as Bill Holman.