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 balloons for a birthday party, they are very big. Everyone commented how large they were, and lasted quite while. They were easy to inflate, I used a auto pump which made the job easier, would recommend.