I now have everything migrated from my Nortek HUSBZB-1 combo stick to the ZBT-2 and ZWA-2 antennas. The difference is night and day, both networks are much more responsive and stable. I have roughly 20 z-wave devices and 30 or so zigbee devices, if that helps.
The migration for zigbee was literally just clicking a button. Z-Wave would have also been a single button, but unfortunately it would’ve required upgrading my HUSBZB-1 (which would require soldering and flashing). It’s not the fault of the ZWA-2, though, so I wasn’t mad about it and knew what I was getting into. I had to exclude and include all of the z-wave devices, but in the end, it was well worth it.
Seriously, if you’re having network issues with either protocol, you might just need one of these antennas and you’ll be set.
I’ve had the ZBT-2 antenna for a while now but haven’t been bothered setting it up yet. I’m on Zigbee2MQTT atm and I’m still contemplating if I should switch over to ZHA or not.
Either way I’d probably be setting all my devices up again for a fresh start as I don’t have that many, anyway.