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.
Ideal first stop for rank beginners, and steps you through in a logical pattern. Many books claim to be for beginners but rapidly move to complexity. Should be used in conjunction with a good instructor, but is a very good primer. You do need to follow the audio and video clips as well.