To calculate the overall star rating and percentage breakdown by star, we don’t 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 analyzes reviews to verify trustworthiness.
Good value for a 6 year old that brushes so rough we need to replace monthly, and for a toddler who has taken to shoving things down sink drains. So we needed something cheap that gets the job done that comes in big quantities.