I tried the Hill's Senior 11+ to see if our two 14 1/2 year old Burmese cats liked it. They didn't like this food at all. I tried it a few times over the course of 3 days - each time they sniffed it & walked away. I waited a week, then tried it again. They still didn't like it. Also, the food itself once opened & in the bowl has quite a pungent smell. Our cats prefer the Royal Canin Aging food. They always eat it, never turn their noses up at it and it does not smell like the Hill's.
My kittens like this food - however they lick all the gravy off first and come back for the meaty bits later. If they leave it too long the meaty bits can dry out a bit.
To be honest they prefer their Felix, but its not as good quality a food, so they get it on alternate nights. The variety seems to keep them happy.