Price is good. You may not think battery life is not important but with 30 different sensors, replacing batteries makes it important. It appears the batteries last forever. The bad thing is they aren't reliable. I have 5 of these motions sensors and 3 of them fail to sense motion at times. Temperature will work but motion doesn't. I have to constantly be aware of this and always test them or watch the history of the sensors on the Smartthings app to see if there was motion sensed. Removing the batteries to reset the sensor will get motion sensing working again. Sometimes it will last for a month, sometimes it will need resetting the next day. That said, I had a Smartthings sensor also do this. I also have a Smartthings motion sensor that give false positives, in other words sense motion with no motion.