I have tried the Wireless PM2.5 and soil moisture sensors, along with the WiFi gateway. Quite simple to setup the sensors and gateway.
The gateway has inside temp and hum as well as pressure, which needs a SL calibration. These track very close to my Davis Vue console.
Too cold to set the soil moisture probe outside so have it in an inside flower pot and that seems very good. I do have the air sensor outside and has been in our -23.3°C last night and all is ok!
Enjoy,
Paul