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 had RaZberry7 Pro or whatever that pi-hat was called. It never worked reliably and pushed my interest to whole home automation stuff back by a quite lot, since it should’ve been at least decent enough. Then I switched to ZWA-2 and the difference was way more massive than I could’ve imagined. I got few shelly devices lately and they’re currently on wifi, but I’m planning to add zbt-2 on the mix and start to migrate towards zigbee/threads. There’s plenty of light switches and other stuff still on the house which would benefit from smart controls and zigbee feels like more future-proof than z-wave.