Good feeder. Cats tried to open it, but it remained closed and not inverted. In the application, you can adjust the feed by hours and the number of servings, or manually, at any time, if you want to give additives. The size of the portion depends on the feed. I used gemon food, one portion came out 8 grams. In total, 3,5 kilograms of feed came into the compartment). The bowl holds firmly, it is easy to remove and clean.