Until now I used to buy Nutram (11.6kg/60€), which I consider one of the best foods, both based on personal experience and international evaluations. Unfortunately, it has been out of stock for a long time (I believe they stopped importing it), so I was looking for an alternative Grain Free food. I bought Ambrosia today for the first time (not through Skroutz). I don't have an opinion on its quality, so I can't judge it for that. I hope it is good based on the reviews and what I have heard. However, I think it is very expensive. For my dog (about 24kg), with Nutram, he had to eat less than 200gr/day (the same with N&D that I had bought in the past). With Ambrosia, he needs to eat about 300gr/day. The 11.6kg of Nutram lasted around 60 days (200gr/day) while the 12kg of Ambrosia will probably last 40 days (300gr/day). Practically, Ambrosia will cost me 50% more in the long run compared to Nutram. It is good not only to compare prices in packages of equivalent kilograms, but also to read the nutritional tables. The difference is significant.

Update (11/10/22): Along with the change to Ambrosia Chicken & Veggies, the dog started to smell bad. Initially, we did not connect it to the food and we consulted the vet for a possible infection or something else. He consumed a total of two 12kg bags and the bad smell persisted. I decided to switch to Acana Adult (60%-40%). In 2-3 days, the bad smell disappeared. It is a much more expensive food to buy, but based on the financial analysis I have done above, it comes out to be about the same in the long run. I don't want to judge the quality of Ambrosia in general. Perhaps the vegetables in this specific formula are to blame, and possibly another formula would have been better. Despite this, I will not bother experimenting again.