Our gorgeous black moggie (male) has always been greedy, and got very good at persuading individual family members that he hadn't been fed, and was starving hungry. It became his life's work! The beauty of this automatic feeder is that he can con us no more... and that can only be good for his health. We've set it to deliver him 3 small meals a day. He did wrestle it over a few times, but never got the lid off. I put a strap round it just in case, and he now leaves it alone. It works a treat!
We originally bought this to use when we travel away for a day or two, but have come to use all the time! Great for portion control and to ensure our cat is fed regularly, without overfeeding. I saw some videos of cats getting into the feeder, so we have tapped the latch on with duck tape and this seems to do the trick.