Moved from ZHA to Z2M. Much easier to handle as I already ran an MQTT container, and re-connecting devices to Z2M doesn't mess with the HA devices.
homeassistant
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I'm on Z2M, mostly because it supports more devices I'd like to use. If ZHA supports everything you have or might want to get in the future, I don't see a reason to switch.
ZHA here. I picked it since it's a bit easier to set up with less bits. It works for me, so I didn't see a reason to change it. I have done channel changes a couple of times with no issue - maybe I just got lucky!
I use ZHA. As I have a Pi, I prefer the less addons the better, and there are ZHA devices for everything. It simply narrows down the spectrum, but overtime it's coming closer and closer to Z2M in terms of device support and features... So...
There is also Matter and Thread on the horizon, so I wouldn't bother complicating things further.
Never had any issues with Zigbee2Mqtt. Works fantastically
I started with ZHA, but moved to Z2M because there was an automation blueprint I needed that was only coded for z2m.
Gotta say, I’m a much bigger fan of the z2m interface. There’s nothing wrong with ZHA but unless something major changes, I don’t see the need to ever switch back.
I'm loving my zigbee2mqtt setup. Took a couple tries to get the mosquitto broker working right but worth it in the long run.
I was using Z2M and found it had some weird, unresolvable device control quirks with a dimmer I'm using. Switched to ZHA and have had no problems at all.
I use ZHA and so far everything works perfectly and it’s easy to add new devices. I only really use Zooz products for my zwave network though.