Official Security Systems did such a great job at my business (featured on facebook page) that I had them install a system at my home. Deren was generous and thorough with his expertise and input and once we agreed on an approach OSS was fast and efficient in their installation. My house presents enough unique challenges to warrant a two-day job, but they completed the work in one! I highly recommend OSS for three reasons: 1. EXPERTISE IN THE FIELD. OSS has a proficient and current knowledge of available technology and how best to apply it. 2. QUALITY INSTALLATION. OSS was thorough in it's assessment of both my locations an proficient in executing their plan in a expeditious manner. 3. RELIABILITY OF SUPPORT. If I call with a question I know my call will be answered. When you need a solution to your security issues...make it OFFICIAL!!!