I have the predecessor (square shape) bought me this machine five years ago to facilitate the food supply my diabetic cat because there was morning and evening several fodder portions at a time interval; already from the part I was absolutely convinced. The successor (rounded shape) is not only just as reliable, but can also be more difficult to crack. At least my cats animal needs much longer for it. Will they do it again, if enough "criminal energy" behind it, but I want to light them also do not make. This machine has often been recommended to me, especially since it has a simple structure, reliable running, and the price is right.