I don't like having critters going though the compost for food so the tumbler was a quick way to get a second secure bin, so I could let the stuff in the first bin age. It heats up some but not as crazy as my new giant bin. I drilled additional holes in the plastic so it would drain better but it's still kind of an anaerobic composter. If someone needed a critter-secure composter and wasn't handy I'd still recommend the one I got, which was less than $200
