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.
Beware if you're buying these for a short term rental property, or anything like that. These tubes are not sealed, so there's no way to know if some used it, or if it's been tampered with. We ordered, saw the tubes are not sealed, and sent them back.