To calculate the overall star rating and percentage breakdown by star, we do not use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyses reviews to verify trustworthiness.
I was always skeptical about getting an electric toothbrush and I have sensitive teeth and gums. This electric toothbrush has made an amazing difference to my teeth. I'm officially converted! Best purchase and the setting for sensitive teeth is great.