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 use two keyoard/monitor switches as I have three monitors and three computers and one keyboad. I have had a loose connection problem becasue as I push computer three into the desk the cable adapter bumps the back of the cabinet. Using this extension cable gave me more room and now the loose connection is gone.