Works great, and it's nice when you forgot to lock your car it can be done from inside the house.
I think so far the farthest away I have been was about 150 feet and it still worked fine.
I did extend the little antenna wire up the side of the windshield pillar cover when I installed it just to give it every chance to work from farther distances.
One day sitting in a park eating lunch with the Wife at a picnic table there were some people walking around the car looking inside (just looking) and I locked it with the remote, and they all kind of jumped a little and looked around to see who did it.
They didn't know who, but they knew someone was close enough to do it. :D
(kind of a behave yourself warning) LOL