I have had this product for a couple years.  My cat was quick to learn how to feed himself more than programmed.  It now has a tray full of food and keeps dispensing more.  For me it's just an expensive pet bowl now.  At least it holds a supply of food.  One thing I might add, is when the batteries go dead even with a backup plugged into the wall outlet it will not work.  Just about threw it away until I put new batteries in it.  I still keep it plugged in though.  I don't know why the manufacturer can't perfect the flap so a cat can't access it.  It's pricey enough they should work on it!