We had Monitronics and had problems with their equipment. We have had the GE system for about 2-3 years. Nice system. No Problems. And they replaced all the Monitronics equipment with free GE equipment and added more securitry to our garage door with remotes - etc. I am sure the salesperson is going to be aggressive trying to win your business. Thats how he makes a living. He had a proper GE ID badge. I work for GE so of course, I was interested in speaking to the gentleman about the product. There probably are con-artists out there. Check their ID. If they don't have one. Dont do business with them.