I had a Clifford 8000i when it was just Clifford, not DEI ... It was a damned fine alarm. Pretty smart too. The "radar" on it was quirky, but that's the nature of those things. It tended to be a little flakey, and it always disturbed any radar detectors I had in the car.

But everything else about it, brain, logic, every other sensor was top notch. It wasn't cheap even back then. Installed mine was about $800, but worth every penny. The only other one I would have considered was an Alpine 8080 I think ... very smart technology, with two way pager and cell phone smartness for notifying you of a break-in. Don't know what's available these days ... I'm extremely happy with my factory Audi alarm, which does more than I need it to quite well. (The radar on it is much better too, IMHO)

Greg