The units were just delivered today and, so far, they haven’t disappointed. Once setup they work the same as the 2-ways in terms of how they appear in the app and connected to Google Home.

There was a wonderful review on the Amazon US site pointing out that you don’t need a unit on both ends of a 3-way circuit. I can also confirm that one unit will do, which means that you can use the 2 pack to smart-ify two different 3-way circuits.

Very pleased with the purchase.