Gravity costs to keep filled but no hassle of batteries, clogged spin feeders,leaks, etc. I used to only use spin feeders because I also believed it was like ringing the dinner bell. After a while they become nocturnal whether spin or gravity. You may ring the dinner bell with a spin feeder but the deer may not eat it until after dark. I wouldn’t buy any Moultrie products as garbage. I have more metal and plastic Moultrie feeders and cameras in the gear graveyard than any other Manufacturer. Metal moultrie leak and plastic are chewed by squirrels and raccoons. My old Metal flat out feeder worked out well for a gravity with little maintenance other than refilling. If I buy another spin feeder it will be an all seasons or a judge.