I agree with David Teitlebaum concerning the Lockzilla, and I would like to add the following: What happens with the OEM lock module is it sends current to the lock solenoids until they move. If they fail to move, then they burn up trying. The Lockzilla instead gives the solenoids a 'one shot' -- meaning that it sends them current for a moment. If they fail to move, then it quits. This is good. What isn't good is that the Lockzilla doesn't warn you if a door fails to lock thus creating a security problem although the OEM lock module and almost all other makes of cars out there also share this problem. A better designed module would give a beep or some other indication in this situation. Another short coming of the Lockzilla is that it will stop operating if the door locks get out of synchronization. For example, you lock your doors, but the solenoid on one side is sluggish and fails to lock the door. An attempt to unlock the door using the Lockzilla optional remote keyless entry will fail until both door locks are returned to the same state by using the door key. However, if you never install the optional remote keyless entry, then this won't be a problem. Walt Tampa, FL