I get the impression that a better title for the article would be: "Spamming links to 7 reviews for ereaders that we wrote in 2014."

The article made no sense otherwise. The products appeared to be ranked, yet one receiving a 4 star review ranked below one receiving a 2.5 star review. The ratings are also inconsistent: the Kobo Aura H2O received 3 stars while the Kobo Aura HD received 4 stars, even though they are virtually identical devices. The criteria used to describe the devices is extremely inconsistent, largely due to it being a copy and paste of summary paragraphs from different articles. On top of that, the article glossed over the most important thing that people need to know about a particular ereader: whether it will work with their ebooks.

Perhaps the individual review articles have value, but given the clickbait nature of this article and the wildly inconsistent verdicts that they plagiarized from their other articles, I would suggest finding your information elsewhere.