Worked, but didn't last
We've used this dispenser 5-6 times over the last year. It worked as explained in the instructions, and in this sense we've had no issues.Ice packs very good idea.
Unfortunately, our cat eventually managed to batter her way through, last time we returned to find one of the sections open, with the timer ripped out.
Not sure if we will reorder. It would help if the lids closing each section were air tight, as the cat knows the food is there all the time. Also, as other people have said, there is no way of telling whether the batteries will last until it's time for the lids to open, so we have had to use new batteries almost every time just to be sure.