Are dual-chamber compost tumblers worth it?

Specialist-community consensus is mixed-positive. Tumblers aerate easily and can finish small, well-chopped batches in roughly two months in warm weather, which is why the two-chamber 'fill one, cure the other' design is popular. The recurring complaints are difficult assembly, messy emptying, and material rolling into dense wet balls that can go anaerobic if you don't balance browns.