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.
I printed less than 100 pages and the ink has started to fade already -- I am shocked, given this was supposed to an "authentic" HP product. It also does not contain a chip -- which would not be a big deal if it actually printed more than a 100 pages.