REVIEW: Philips Sonicare DiamondClean electric toothbrush

Can you covet a toothbrush? That's a question Philips are hoping to answer with a resounding "YES" with their latest electric brush, the Sonicare DiamondClean. Packed full of teeth-tidying features, it's about as techy as a toothbrush is ever going to get, and as expensive too. But is it worth the £250 asking price?