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.
Switching between AC and DC is not very intuitive. Even though I know how to do it I still forget sometimes and end up measuring AC instead of DC. Also sometimes take 2-3 goes to get the DC current once switched from AC which is a bit annoying. All in all works but has some quirks.