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.
Perfectly packed, the cage is easy to set up without too much reference to the instructions. The guineapigs loved it immediately. The cage top comes included so it’s up to you whether you want to put it on or leave it off - the cage can be set up to your preference which is great.