At least this gateway worked for Zigbee 3.0 - not all seem to; so much for Standards. Setup took awhile, not intuitive or easy. However easy enough after playing with it for awhile. Easy to delete a switch and restart the process over. Now working and talks with Alexa so I now have voice commands to turn on my lights, fans (+ speed control). I'm happy with the outcome but will say this technology has a long way to go before it truly is plug & Play or intuitive.