It is pretty simple. Took me about 15 minutes to get XBee up and running. I also installed one of Iman’s Zigbee repeaters, which also includes temperature, pressure, light and humidity sensors, supports 20 zigbee end devices. As a repeater I prefer this over my XBee. I like XBee because I can see my mesh. Without XBee I would not have realized that my Sylvania par38 bulbs were my biggest problem in my mesh. Last couple of weeks I was having horrible time with my Aqara motion and door sensors becoming unavailable, some times 10 – 12 at a time. I have not had a single one becoming unavailable since adding these 2.
Take a look at the below thread. There are some helpful links posted by members of this forum that really helped me.