I contacted Armando because of the high rating he received from Yelp. And he was just like what was said about him: polite, down to earth, providing honest opinions and reasonable price, and not selling you anything that you don't need. He converted an existing land-phone based alarm system to a web-based one, and the system works well! I like his business model of not having middle men or contractors. Even though I am bounded by any multi-year contract, I may stay with Central Security for a long time.