I've been using R&S Erection of Concord for 5 years. They have off hours service which is good for us. Anytime I call, I usually get service in an hour. They've done rolling gates, new gate installation, service repair on old gates, and gate access systems for us. I have buildings with high security, and R&S is one of the better companies to work with. I've worked with other companies and would not give them such high marks.