Amazon calculates a product's star ratings based on a machine learned model instead of a raw data average. The model takes into account factors including the age of a rating, whether the ratings are from verified purchasers and factors that establish reviewer trustworthiness.
I am using these shoes on rough outdoor terrain everyday since the day they arrived. The attached pic is as they look today (20th March 2020). I am a happy customer. Good value for money. I bought a size 10. It worked better for me with an insole. Planning to buy size 9 the next time around.