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 as a Christmas present for my 20-something son. He loved it. He tells me that it was wonderful to build. It was sufficiently intricate and challenging to be enjoyable without passing into that dreaded frustration-throw-it-against-the-wall zone.
My husband loves to build lego and the Volkswagen Beetle was a challenge. It is just lovely, remembering surfer days a long time ago. Challenging but worth the time and effort you put into creating it.