This product saves me a lot of worries, i just put the fish food in it and i don't need to worry about anything. The manual instruction is quite straightforward and easy to set it up, easy to configure and also to mount it. Inside you can put a lot of food for a long period so you don't need to worry about it. It a really great addition for the aquarium, you'll always be sure that the fish are feed even when you are missing for some holidays (and the batteries keep for a long tine, i think it was written in the manual around a year). Definitely something you should have if owning an aquarium.