We have 4 cats, with 2 cats may get only special diet food due to a food allergy and renal insufficiency. Of course, the two want to eat even the obviously better tasting food the other two cats so it was far more costly to feed four. Due to the high price, I first try to only appoint a machine and tried our tastiest and most cautious cat. For 4 weeks, the machine is now in operation and I am very satisfied. The commissioning was very simple. This used to the machines went within a few days and the noise of the flap is not particularly loud, our cat a little irritated at the beginning. The programming of the chip was quickly carried out without problems. None of the other cat gets to the food! Cleaning is easy. The only downside was the owner's manual that was at least for me only in English for. After this convincing practical test also the other cats will still get a feeder now.