Amazon.sg:Customer reviews: Just the Crystals 2-Pack. Longest Lasting Premium Crystal Cat Litter Absorbs More, Fragrance Free, Best Odor Control. Two 4.4lb Bags per Box (Total 8.8lbs) for Ultimate Convenience.
Amazon calculates a product’s star ratings using a machine learned model instead of a raw data average. The machine learned model takes into account factors including: the age of a review, helpfulness votes by customers and whether the reviews are from verified purchases.