To calculate the overall star rating and percentage breakdown by star, we do not 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.
Quality of illustrations less than outstanding. Of limited use even for something as basic as replacing plugs which on a Honda Fit, I'll admit, seems to approach major surgery. (Kind of disappointed in Honda engineering too. My 29-year old Toyota Corolla seems much better designed for easy servicing). In the long run, who knows, maybe it can save as much as it costs but there might be more effective information on the net. Three stars is giving it the benefit of the doubt.