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 am using it in Patio and french windows. Looks as good as original from a distance. Helps ease your eyes. Planning to buy more later. Price can be little less and add more variety. I have bought earlier for much lesser price in wish.com but not taking chances anymore after a fraudulent transaction.