I'll also chime in that I have a lot of 3 way and 4 way setups, also all Zooz and all work fantastic - took some patience and time to get there. Most are dimming, and a few just on/off. I came from Insteon where the only method of #-way switch was virtual, so thats what I went with - no companion switches. All are the "primary" actually controlling the load and the remaining just effectively hard-wired remote switches. ... here's some history Zooz ZEN 72 dimmer association group doesn't work with double tap - 
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