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 was in the look out for a portable bluetooth speaker for few weeks and was initially keen on JBL or Sony brands. Later I started looking at Bose as well. Sony got ruled out because of poor sound quality. JBL's sound quality is not bad but what helped to make my decision was Amazon's fantastic pricing for Bose plus free delivery. I am really happy with the prompt delivery and the Bose meets my expectations. Very happy customer.