I’m not the developer (who knows a lot more) but have helped a few people on the forum 
. Developer has full time job with travel, so isn’t around as much as when he wrote the ZW and Zigbee bindings.
I have used the OH Z-wave binding and have contributed PRs, but have shifted over to a ZW to MQTT solution (with OH of course). It is part of the HA project and gets full time support, has access to the ZW Alliance and has more recent upgrades (like S2 security).
I have no reason to doubt your Z-station. (I’m just not familiar with it and your setup). The OH ZW debug support is good and there is a debug reader here that the developer wrote when he wasn’t as busy.
I use Zooz for Z-stick and many devices. Aeotec is also a solid choice, both have good support.