Amazon calculates a product’s star ratings based on a machine learned model instead of a raw data average. The model takes into account factors including the age of a rating, whether the ratings are from verified purchasers, and factors that establish reviewer trustworthiness.
I Had bought for my Mum to do . But she couldn't do it. She is 93 so it's to be expected. So I thought I would give it ago . It's slow but I'm getting there. I don't normally do jigsaw. As I usually hate doing them. But at the moment it's slow but I can't wait to see it finished.