Mr. Pistol's Palace
alarm
Home
Lynx
viper.jpg
  Having a soft top and parking in a dimly lit alley, I knew I would need an alarm for practical reasons and piece of mind.  I wanted one that had a silent arm/disarm feature and a field disturbance sensor (radar) option.  I went with a Viper 500.  I didn't need or want the remote starter function of the 550 and the lower models didn't offer the silent arm/disarm (there's something about that chirp-chirp sound that irritates me).  The field disturbance sensor was extra, but worth it in my opinion. 
I chose a stereo shop in the area for the job.  All in all, the total price was more than I would have liked.  However, I figured a one time payment for a quality alarm and installation wouldn't kill me.
viperkeys.jpg
viper1.jpg
I have been happy with the alarm.  The field disturbance sensor works like a charm.  I told the installers to set the sensitivity low.  I haven't had a false alarm yet.  It also works well when the top is down.  It will warning chirp if you put your hand inside, and it will go off if you leave it there.

Update:  Well, first off, don't bother installing the little push-rod sensor onto the rear tailgate...it was only a matter of time until a case of beer or a cooler broke that right off.  Second, my "warning chirp" when someone or something enters the jeep's "perimeters"  doesn't work anymore.  Now, it will just go into full blown annoying siren if it senses a disturbance for long enough.  Other than that, it still works fine after a couple years.  As long as it goes off when a door is opened, and it doesn't false alarm I will continue to be happy.