i'm running viper in my 98. love it. has a lot of options as well. many settings, and no false alarms. even in the middle of the blizzards the northeast had this winter, not a single false alarm with the heavy winds and what not. i must say though, that commando keypad is very very similar to the viper's. right down to the icons on the buttons. the viper cost me about 300, installed, with lifetime warranty.