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.
I bought 2 different varieties at once and I liked both equally. I got good value from a promotion but would rate the product higher if they had better value options as standard like a discount for each extra kilo ordered. Not only do I do a lot of cold brew but I believe that coffee tastes best a few weeks after roast date when it has enough time for the bitter CO2 caused from roasting to bleed off so I usually order 3-4kgs at a time.