I love this device. It is easy to transfer any pdf to, has great browser for reading online articles, has great functionality, and overall feels amazing. The UI could be improved a bit, but it never gets in the way. And there are great sorting features for the books. Its a shame they took away my most used thing (audio) for the later models, but if you happen by this model I'd recommend picking it up. Battery Life Never had it run out of battery fast, even when I use it for music, it still lasts a day. Display/Screen Quality It's not the best screen out there quality wise, but I love how it feels to touch, and it's great for web browsing, as it supports multi-touch. Call Quality Not a phone Ease of Use Some things are hidden, but overall the usability is great. Durability It's so light that drops will not really effect it. Only pressure from a source may crack the screen. Design Light, feels great, buttons are perfect. only issue is that my nails took off some of the paint on the buttons.