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 use this cleanser as my second cleanse after my cleansing balm. This leaves my skin dewy and soft but did not help me with controlling my oily T Zone. I also use the 2% BHA Liquid exfoliant and the niacinamide gel moisturiser from Paula's Choice after using this cleanser which is perfect for my night time routine.