I've had the 350 on my 82 Blazer for about 6 months now. Haven't had any problems has prevented a few break-ins. I bought the Back up battery so if someone cut the battery there will be back up power. I defiantly recommend the system. I do-not recommend you install it if you do not have any mechanical knowledge. Take it somewhere and have them install it. Also do not drive it through 2 foot deep puddles.