I have a whole bunch and they are mostly ok but I do get a disconnect time by time and 1 has just started giving me false positives (I'm still trying to get to the bottom of that, changed the battery but it's still happening). So they are cheap, look great, but do have a few issues.
My favourite motion sensor right now is this one...
Zigbee 3.0 Tuya Mini Smart Human Motion Movement Body PIR Transducer Sensor Smart Life Home Security Wireless Connection Light
https://a.aliexpress.com/_mq4GQpY
It's tiny, round so it can be hidden in a hole in the skirting board or ceiling etc., seems to stay connected well, and the best feature is it has a refresh of around 15 seconds out of the box. I really like it.
And here's the driver...
