I just had an Excalibur remote start alarm system installed in my 07 Av.
It seems to work really well, and has a lot of programable features that are cool.
I had a motion sensor (Code Alarm) installed in the bed area, on velcro incase I take it to the carwash and spray the bed out. It pulls off and unplugs.
The remote is a 2 way type, and lets you know the condition of the alarm, and if it has went off.
It shows if it was a shock sensor activation, a door open, or hood raised, and the remote alert is audible, vibration or both.
I am now adjusting the sensitivity on the sensor, as the alarm sounds when jets go over the building......I work in the approach area for Lambert Field.
I still have the option of purchasing the GPS add on, that also will communicate with my IPhone for alarm control, and text messaging when the alarm goes off.
Its pricey though......$400.00 more on top of the $450.00 that the system costs.
I have had alarm systems save two vehicles in the past.
Maybe they will just move on to the next one, and leave mine alone!
Mike