Philips Sonicare toothbrush overpricedPurchased one of these toothbrushes in Malaysia at a reasonable price.Now in UK need to replace the heads but the prices for them is to say the least extortionate and there is no way that a plastic toothbrush is worth what they charge. It even costs more on their website that the prices at high street retailers.The toothbrush makes a humming noise when you use it which is ton justify the sonic term used.Well fact is in my case the cleaning is no better than using a much cheaper option a fact agreed by my dentist.My advice is choose a more economical option. I have changed to Oral B where many offers on both brush and replacement heads are available