Sonoff Zigbee sensors - NotEnoughTech

I'm checking out Sonoff ZigBee sensors by ITEAD - what's the budget sensors like?

27 Sonoff SNZB-04 Zigbee door/window battery-operated opening/closing sensor

Sonoff Zigbee Smart Home Devices

SONOFF Zigbee Smart Indoor Temperature Humidity Sensor, SNZB-02D Zigbee wireless Hygrometer Thermometer Works with Alexa Google Home Smartthings IFTTT

SONOFF Zigbee Smart Indoor Temperature Humidity Sensor,Zigbee Hygrometer Thermometer Works with Alexa Google Home Smartthings IFTTT

Sonoff Zigbee Bridge Pro ZBBridge-P Zigbee compatibility

SONOFF Zigbee Smart Indoor Temperature Humidity Sensor, SNZB-02D Zigbee wireless Hygrometer Thermometer Works with Alexa Google Home Smartthings IFTTT

Does Blitzwolf Zigbee sensor work with Sonoff?

Are new Sonoff ZigBee Sensors better?

SNZB-06P Issue with ZHA : r/homeassistant

SONOFF usb zigbee hub and devices in Home Assistant

Sonoff Zigbee sensors - NotEnoughTech

Even smaller ZigBee switch: Sonoff ZB Mini Extreme (no neutral)

Sonoff Zigbee sensors - NotEnoughTech

SONOFF Zigbee Human Presence Sensor