I've used the dimmers for many years and have found them pretty good. A couple have failed within 5 years. The door contact sensors can be problematic and are easy to reset when changing batteries. Battery life is not good in high traffic areas and I replaced them with wired/battery-less sensors in these locations. The 3-in-1 motion 'eye' sensor is poor. Battery life is bad, latency is very poor for proper occupancy applications and to save battery life, they sleep for quite long periods. Depends on your application though, they could work. For PIR sensors, I always used wired, to get the reliability and performance I need.