Title: Couldn't get them to work
Review: OK, the alarms are fairly piercing, but that doesn't do you any good if you can't get them to work. I installed the main alarm on the door of my daughter's apartment but couldn't get it to work, once it was installed. It appears that the sensors need to be nearly touching and exactly in alignment. The only time I could get it to work was when I was holding the sensors next to each other in my hands.
Is this product review negative?