Title: Fork out a little more for something better!
Review: I purchased one to monitor my driveway. First of all, it doesn't have nearly the 400 foot range that it says it has. Also, if the sensor or reciever is placed in a metal building it will cut the range down even more. Lots of false alarms. My sensor was mounted to a fence post and I even built a three sided box around it to try and lesson the false alarms, but that hasn't helped much. You get what you pay for, so spend a little more and get something that works.
Is this product review negative?