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.
Exactly what the picture shows, took no more than 5 minutes to put together and it’s really sturdy. Both our cats instantly took to it and spent the next 5 hours playing with the mouse on top and then next 5 after that sleeping in the cave and on top. For the price this is perfect, I would buy again if I needed to.