Yes we had the Joy for All Black & White one which I chose because thought looked most realistic of the colours
I suspect how it works for an individual is as different as dementia is and as differnt people are. My parent liked it found it entertaining and enjoyed watching it - it moves its head and does this thing where it lifts its paw and rolls its head back exposing its tummy which makes it look sort of real. It looks like its going to fall backwards but recovers itself.
It purrs and if you have it on your lap you can sort of feel a vibration but my parent never got into stroking it.
It makes a meowing noise which you can turn off - a child found it disturbing and didn't like it.
Like all these things, it was a bit of a novelty at first and then became something wheeled out occassionally.
I was googling for it for a link to show you and see here there are other versions from different manufacturers with more sensors.
https://www.robopets.co.uk/shopnow
We also had this tiger (link below) in black and white which is now not available I think but if you google FurReal they make different ones and also a similar one to the tiger in yellow not ivory. The Tiger is very entertaining. he moved and roars and is very cute but is quite hard plastic covered in fur so not very "cuddly" or soothing. If you are looking for something interactive and a bit differnt the Furrels are great - at least this tiger was. He has more individual movements and noises than the Joy For All cat. I'm sure you can find some videos on line if you look.
https://www.amazon.com/FurReal-Playful-Interactive-Combinations-Exclusive/dp/B07G3GTVT5
Both of them were good buys and I didn't regret either in our case but I think for my parent the Furreal tiger was more engaging than the Joy For All cat - like I said though, people are different.