Instruct: Classify the given Amazon review as either positive or negative.
Query: Works as advertised

I used to have a motion detector for my 200' driveway. It had way too many false alarms caused by shrubs, leaves, animals and other things that were not people or vehicles. So I stopped using it. I bought this unit to hopefully alert me to visitors in vehicles knowing that it would not be effective for pedestrians. It has worked as advertised. I have it installed at the entrance to my driveway. The transmitter is about 200' from the receiver in my house. The signal has to go through some shrubs and 2 walls. It has worked every time a vehicle has driven over the hose. The one thing that would be nice that is not built into this unit is a counter on the receiver. Something that would show how many times the unit was activated. That way I could tell if anybody had entered my drive while I was away.