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 this product thinking this was all I needed, after waiting weeks for it to arrive I discovered that I also needed the activation solution which would take another 4 weeks to arrive. This wasn't stated anywhere when I purchased the product. I bought a kit from my local supermarket that did the same thing and was a lot more accessible. Waste of money