Features:
seeedstudio.com/wiki/Grove_- … troduction
Example:
seeedstudio.com/wiki/Grove_- … rogramming
Config:
seeedstudio.com/wiki/Grove_- … es_Summary
Your choice is good. Very nice project for beginner 
I use RFBee with XBee Carrier and Humi/Temp sensor for my Humidor. Its LiPo powered (no wires and very small but the RFBee does not runs out of the box as standalone device.