The Find My network has like 2 billion Apple devices on it, so yeah, the tracking range is genuinely impressive compared to Tile's smaller network. Big caveat though - AirTags rely on those devices being in range, which means they're basically useless if your friends lose their keys in an actual remote area or somewhere with sparse iPhone coverage. The keychain form factor is solid and the battery lasts forever, but they work best in cities/suburbs where you're guaranteed to have other Apple users nearby constantly pinging their location data.