No idea, I have never used it.
I recommend to search the forum for answers.
Can you share more details on your network configuration? How many nodes you have (powered/battery). What is your hous/flat structure? Do you use zwave repeaters? Maybe such a device would help in my case.
Do you have problems with including/excluding nodes?
What tools you use to debug the z-wave network, if any?
I decided to try out UZB without the z-way license. Rely on you experience @sihui 
Re debugging:
- ZWave - Bindings | openHAB
- [SOLVED] Unresponsive Z-Wave Network: Tools and Approaches to track down the issues
Use the Z-Wave Network Map
to get a basic idea about the neighbors of each Z-Wave device. Note that the relationships in the Network Map do not necessarily correspond to routes of the Z-Wave packets. The routing is done by the Z-Wave controller and AFAIK the routes cannot be overridden by the user. You might consider using Zigbee, IIRC max hop is 10 (30 for Zigbee Pro). But if your Z-Wave network spans 4 flloors and you cannot get it to work reliably, I would place the Z-Wave controller on the first or second floor (even if you would have to install additional hardware (UPS, …), it is cheaper than replacing Z-Wave with Zigbee ).
Thanks for this post.
this is true indeed. Let me check if it works from basement and then eventually move one floor up
25 total, 16 mains powered, 9 battery powered.
2 story, all solid brick, also the inner walls. Around 140 squaremeters.
As said before: zwave is building a mesh network, all mains powered devices are repeaters.
No, never, not even with battery powered devices.
Never had to debug anything, it is just working 
thx. Let me wait for my new UZB Stick and try it out
Don’t forget an extension cable: