I have an older version of the 1500ft. remote/pager and it works pretty well. The auto-start is a bit touchy, you have to be sure to shut down the car in the exact sequence and it usually trips itself into not working if you're parked in a garage, but otherwise it works really well.
The range is still really good with the remote I have though. I've been walking around on the campus at my school and it'll alert me if someone has driven past my car with a loud exhaust (or some other light disturbance) from way away, even if I can't see the car at all.