Best Door (open/close) and movement sensors?

Devices & Integrations
7

I would recommend to stay away from ST door sensors and use a cheaper but not cheep quality open/close sensors from Xiaomi:

https://community.smartthings.com/t/xiaomi-zigbee-door-window-sensor-motion-sensor-smart-button-device-type-beta/31948?u=lmosenko

And you can buy them here for only few dollars:
http://www.gearbest.com/smart-light-bulb/pp_257677.html