Hi Ina,
I've looked over the product you've mentioned, and it looks like decent food (ingredient-wise), with the exception of Menadione Sodium Bisulfite in some of their canned foods, and that most of their foods are fish-based. I don't recommend feeding cats mostly a fish-based diet, it's usually addicting and after a while, they won't eat anything else. It's also a highly allergenic food in many cats.
You can read more about fish and menadione here:
Why Fish is Dangerous for Cats | Little Big Cat
The ONLY Approved Vitamin K Supplement in Pet Food | Truth about Pet Food
While going grain-free is
fantastic:thumb on your part, I also believe Purina's products are highly overpriced for what it is. I mean, this product comes only in those small, 3 oz cans, correct? If you're also trying to save some money, I'd say you can do a lot better buying canned foods from many other brands. Many of which you can find in your local independent stores, which are usually CHEAPER than big box pet store's pricing to remain competitive.
As examples, I've broken down the cost price-wise based from an online store (Chewy.com), just to give you an idea what you're paying for
per ounce, but please note that prices do vary from store to store and state to state (assuming you're in the US):
Purina Beyond Grain-free chicken, beef & carrot: $13.75/case of 12, 3 oz = 0.38/oz
EVO Chicken/Turkey $23.99/case of 12, 13.2 oz = 0.15/oz
Wellness Chicken $27.99/case of 12, 12.5 oz = 0.19/oz
Wild Calling Turkey $36.99/case of 24, 5.5 oz = 0.28/oz
Wild Calling Duck $48.49/case of 24, 5.5 oz = 0.36/oz
Nature's Variety Instinct Chicken $34.80/case of 12, 13.2 oz = 0.22/oz
Nature's Variety Instinct Rabbit $50.52/case of 12, 13.2 oz = 0.32/oz
Tiki Cat Puka Puka Luau (chicken) $19.99/case of 8, 6 oz = 0.42/oz
Note that the Purina Beyond is $1.14/can here, but even if at $1.09/can, that's still 0.36/oz you're paying, which is still more than most brands I've listed. The ONLY one that is super expensive here is Tiki Cat, but you've got to know that this is one food that is very high protein,
and there's absolutely zero carbs in this food. Not just grain-free, it's void of any starches at all, and without harmful/controversial ingredients (it's basically shredded chicken in broth with added minerals/vitamins). If you get your cats on a rotation diet of several good quality canned and want to include the Tiki Cat chicken now and then, it won't be such an "ouch factor" on your finances, especially if you can afford feeding Purina Beyond regularly, lol.
Now, with all that said, some things you buy, your cat may or may not love. So it'll be pretty much up to your cats, with maybe some negotiating on your end on finding the right food they'll eat and something that's good for them, too. Many of us struggle with this. If your kitties are young, they're more likely be open to the new, healthier food you're trying to offer.
Going grain-free is a wonderful start, but if you can, for your obligate carnivore kitties, you want to go towards a high protein, moderate fat (for satiety), low carb (under 10%) diet that doesn't contain mainly fish, glutens, or ethoxyquin, menadione, or unspecified meats like by-product meals. Howsefrau has also given some good advice about avoiding those foods with gravy. Gravies indicate more starches in there. If your cats like gravy, buy the pate version and add some warm water to make your own 'gravy'. Many do this for our cats who don't take in a lot of water to begin with.
Hope this helps you some, good luck! Oh gosh, I realized how terribly long this is. Sorry about that.