Is a single-channel dash cam enough, or do I need front and rear?

Across the reviewers we read, a front-only camera covers the majority of at-fault and not-at-fault incidents and is significantly easier to install and hide. Specialist communities recommend adding a rear channel mainly if you're worried about rear-end collisions, road rage from behind, or commercial liability. For most commuters, a high-quality single-channel cam beats a mediocre dual-channel kit.