Their auto blinds were awful. Original warranty was 10 years, they were so unreliable they shortened the warranty and after replacing 2 of my blind told me this is it. So when my blind goes bad again I'm going to have to fight with the manager.
I recently tested all the IKEA matter devices, and running the latest firmware I find that the latency on the motion sensor is quite high and the detection range significantly changes based on the orientation of the sensor which is unusual. Overall the devices are good value, but I'd avoid the motion sensor at the moment.
Based on two days with the motion sensor the responsiveness feels very good. The reduction in hops may be the key there. It’s too early to tell about the connection reliability but I’ve been using IKEA zigbee stuff for years with no issues. The build quality of the sensor and their new switches is very high.