Out of curiosity, why did you decide to go with Z-Wave over Zigbee?
All wired Z-Wave devices also act as repeaters to extend the network, which is handy.
It really just seems to come down to your local market. Zigbee seemed to have more compatible devices in the US vs zwave so I went with zigbee. I only have about fifteen devices, mixed between a few manufacturers, but it's been rock solid after I switched from my initial conbee to a sonoff dongle.