A recent study from the Nielsen Norman Group found that those who read books on an e-reader tend to get through content more slowly than those who read actual books. It also found that, on a scale of 1 to 7, Apple's iPad provides the best reading experience out of all e-readers with a 5.8 rating. It was closely followed by Amazon's Kindle, which tallied a 5.7 rating. Many still gave the nod to paper, which remained the fastest to read of all.