Title: Bad Sensors... Get Ackton's Precision Park
Review: The reason why your sensor wasn't working because it picked up a false alarm. The only company that prevents false alarms and guarantees it on all their backup sensors is Ackton Inc. They're extremely high quality sensors, but a little more pricy. Other than that i've had several problems with these sensors like you along with other companies... Ackton's Sensors work really really well.
Is this product review negative?