Have have been poking round the Internet and have seen different views as to whether the animal (cats) are well treated. I guess it's similar to the debate on captive dolphins at The Atlantis on the dubai forum (which we've done although afterwards felt a little uncomfortable).
It seems some people believe that the cats are subdued (drugged) to allow the interaction that takes place.
I have seen some threads on Trip Advisor but they are fairly old.
Would be interested to hear recent experiences.