Having the sonic toothbrush since 2007, it takes just new brush heads every 3 months. Ensure that moves with the times already in's money but I'm just fine, white and clean teeth. Alone the smooth Geführ when I stroke her tongue over my teeth showing me the difference to a conventional manual toothbrush. Previously had other electric toothbrushes Oral-B but this is my opinion, so far the best !!