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.
Noise was my main reason for getting this kettle and it certainly delivers on that. Sometimes I don't know it's finished boiling. The kettle also looks very nice. I would have liked the liquid capacity to be a little more, but we drink a lot of tea in our home, so this wouldn't be an issue for other people perhaps.