This auto-feeder was taller than my last and I wasn't sure I would like it. I set it up and waited to see how my cats would react to it. They are using it and eating most of the food in the delivery tray. I was hoping the food wouldn't accumulate in the single food tray but it hasn't because they've been using it and eating from it. Most likely they are taking turns using it because we have several dry food stations set up and they always eat from each others food bowls. We have 4 active users. Noise wise i haven't heard it make a sound.