To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyses reviews to verify trustworthiness.
Had to have extra Boundary Tape because I have several areas of cords to block off. The strips are easy to cut with scissors. Haven't had any problems and it works well keeping my Shark Robot off the forbidden path of cords. Jango