Dyson's £420 CameraJet toothbrush: clever tech, steep price

Dyson's first electric toothbrush, the CameraJet, combines a brush and water flosser and watches how you brush, but costs £419.99. A review praises its clever technology while noting far cheaper ways to get an effective clean. The product briefly vanished from stores after reports of early units failing, which Dyson blamed on a single component issue in a few early batches.