I too had a CrimeStopper unit installed on mine, has the paging system on it...vibrates and lets me know when the alarm has been set off. It too can be set to start at different times and I eventually want to get my windows hooked in to it so at the press of a button the windows with either go up or down...I have yet to decide with one I want it to do...

But yeah they are nice, I had to have the tranceiver replaced rigt after I first got it installed...but since then no problems at all!