We use Perimeter Security Systems at the corporation I work for and I think they do a great job. What really stands out to me personally, is how quickly they respond . When we initially called them up for set up, they got to us right away. If we needed a repair or had a problem, they got to us right away. We were never put off or rescheduled and that matters in this business. They also have quality workmanship and customer attention that speaks for itself. They are professional, trustworthy, and I highly recommend them.