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 analyses reviews to verify trustworthiness.
I bought these refills for my husband and myself to use. We really like them. The brush heads are firm, but not too stiff, they last a really long time, but actually tell you by way of colour change when they are due to be replaced.
Fast delivery. Great value but could be a bit cheaper looking at the fact that it is a piece of plastic + it also doesn‘t last as long as the stated 3 months. They still do their work though and it really feels like my teeth are clean.