Ive had the Beam extender and door and window sensors since the early spring. I gave up on them after couple months since it would never work properly, This week after the last update with the new App I decided to try to get them to work again. So far they work great with the new app, problem I have now is I cant program more then 3. Before when I program them, they all programmed, but would always kick out the oldest one as I add another. Now I cant get more then 3 of them to work at all. It does not matter how close or far away they are from the Beam extender. The batteries are good in each one.