Yeah, he was the runt of the litter we think, and abandoned by his mother. We pulled him out from under a neighbor's porch and got him through it, but he always has a bit of a frantic urgency around food time, even for a cat. Our other cat was 100% good with one of those gravity feeders and would just graze over the course of the day and keep himself at a good weight.
We've kept the auto feeder around so the one can get five or six smaller meals throughout the day, since he eats so fast a normal portion often causes issues.
It's basically a dumb alarm clock that drops food in tablespoon increments. Only features I wish it had that it doesn't is an "I'm nearly empty" sensor that could flash a light, and the ability to sync it's clock with the radio broadcast time signal, since it drifts waaay more than you would expect and we need to reset the clock every month.