I used Diamond Quest to install a video monitoring system and ten cameras at my place of business. Not only am I very satisfied with the high quality of both the cameras and monitoring system, but also with the friendly, courteous and professional service I received from this company's staff. From initial inquiry through system evaluation and installation, I was impressed with the knowledgeable and efficient staff. I would highly recommend this company to anybody. I intend to purchase a home system from this company as well.