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.
When I opened the package I thought one bottle had broken. Thankfully, only the lids on 2 of the bottles weren't on quite tight enough. That's why minus 1 star. Otherwise, everything was exactly as described.