We have Arden Grange here. One of my cats and the foster cat eat it and do well on it (along with wet food) but the other isn't a biscuit eater.
I also have it for the dogs - adult lamb and rice. However, I and others who have used it have found that the dogs tend to put on weight quite readily with it (even when fed proper measured amounts). I've had to take my weight gaining prone lab off it, but my other girl still has it as she is less prone to weight gain and more active. It produces nice poos and shiny coat and other than to watch the weight gain, I would recommend it (also cos not tested on animals). They both eat it no prblems but then they are very good at eating whatever is put in front of them!