The one nice thing about it, above Zigbee, is that you can expect devices to work together. With Zigbee you frequently have to pair a device with a hub from the same manufacturer.
During my first attempt at home automation, I used to mess around with flashing custom firmware onto WiFi devices (Tasmota, ESPHome.) It was a huge pain whenever the hacking process stopped working (tuya-convert), and I had to open up the device, solder some wires, and flash the chip via USB serial.
Nowadays I can just buy any Zigbee product I want (usually from AliExpress), and get it set up in zigbee2mqtt without any extra steps. And it's all local within my home, and no hubs or cloud services required.
I think Zigbee is better for me because I have a lot of battery-powered devices, such as sensors for motion, door contacts, and temperature/humidity. I'm really impressed that the button batteries usually last for 1-2 years.
On the other hand, Zwave radio spectrum varies depending on region, so you need to be very careful that you don't spend hours troubleshooting something that doesn't work because it's a device intended for the EU market instead of US.
IIRC, Zigbee is better here.
I have a handful of Aqara sensors that constantly dropped away, so I just flashed an XBee with router firmware and have it on a small USB battery that stays plugged in. That way power outages won’t cause issues with the “leave and rejoin” request that routers will issue to aged-out devices, which my Aqara devices seem to balk at.
