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.
Decent 7/10 for a 3DS game, 5/10 for a mario game. Well worth a playthrough, even if just playing the pre-built levels. A good few hours of play. The selects version for 13.99 is a reasonable price but I wouldn't want to pay much more.