Debbie, congratulations on your 25th anniversary!
the Sky Suites are large at about 251 square feet with a 57 square foot balcony. You can see a lot of information about the Sky Suite here
We always say that all reviews must be read with a grain of salt. Not only are dissatisfied people much more likely to post reviews than happy campers, things like food are so subjective. Two people can eat the same meal with one loving it, and one hating it. I've never been on a Celebrity ship without finding food I like to eat.
I haven't been on Infinity lately, so I can't speak to whether it's in need of renovation, except to say that Celebrity is usually good about keeping up their ships. Perhaps someone with some recent experience will have more information.