We were approached by two larger security companies who never told us we could arm our existing system inexpensively as Locktec did. Those companies told us we would have to have the existing system taken out by the company that installed it, while THEY installed very expensive systems. Loctec showed us that was not the case at all! The people at Locktec, Inc. impressed us with up-to-date technology knowledge but with the kind of honest, hard working, concern for the customer we were looking for. We are very grateful to the friend who recommended them to us!