I was in the market for an after market alarm with remote start and after some research, I came across CompuStar to 13 was proximity sensor and automatic lock. I like the look of the T 13 remote plus the proximity sensor pretty much sold me. and the system is only installed by certified dealers. I went to tri-state. They did a wonderful job. I have no regrets and I recommend to all my friends who are in the market for aftermarket remote start with alarm. Well thought out and engineered quality product.