My cat is doing well with it, they are topgesund and if there are times indigestion that comes more likely from what they still out so wegputzen (mice, crawling stuff etc.). Otherwise, they have an ideal body weight, beautiful coat and healthy teeth, what more could you want?
Most of all of the Purina varieties they eat the indoor feeding. That this makes the litter box stinks less, although I can not confirm, but I did not expect.
I've always felt them to do something good, next time I'm offering a little variety and therefore they have almost all varieties of Purina times encountered in the well, but mostly they just want what is there always.