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.
The screen readout is very small, you will need your reading glasses, at least until you become familiar with the screens. Adding music and podcasts is difficult (with Apple OS), but the end result is adequate, considering the price. It's not an iPod.