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.
It could only weigh in oz, the unit button didn't work. I wrote to the seller as I wanted to feedback and see if they could offer some form of partial refund (lazy to return the item, I was making do by converting into oz but it was a chore),absolutely no response from them after weeks and 2 messages. Disappointing.