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.
The bottle wasn't even full. What's the point of paying handsomely for something that's not not even enough in quantity. The serum works well no doubt but could've appreciated if it was not half the bottle.