I have been using it for a year and a half now and I have seen a great improvement in my cats' fur and energy. Just be careful with the amount of food because it is high in protein! :) Do not exceed the recommended dosage.
Also, I want to tell the person in the reviews whose cat scratches itself after eating this food, your cat may have an allergy to one of the ingredients, so it's better to change it. (I also have a cat with severe allergies and it did the same with other foods.)

Tremendous itching immediately after taking this specific food. It bit and bled all over the body! Maybe it only happens to my cat.

After 4-5 months, my cat got bored of her previous food Carnilove (Fresh Carp & Trout) and I decided to try the new range from the company.
I got a small sample from a local store and my cat went crazy for it, she acted like a maniac, she wanted more and more, as if we hadn't fed her for a year! She has never reacted like this to any other food.
However, because it was only a small bag, I don't have an opinion on its effect on her coat. Despite that, her bowel movements were normal, she didn't seem bothered by it.
I immediately placed an order and I'm waiting for it to arrive, hopefully my cat won't eat me until then!