Everything! Typing even one word to search for a book is annoying, the keys are tiny and awful to type on, I have to use the side of a fingernail to press a button. I can type faster on a nokia E71, and don't even think about comparing to a blackberry bold. That's the old Sonys. The PRS 350 and 650 use infrared touch screens with no extra layers and the same pearl screen used on the kindle and the new nook and kobo. The new nook and kobo also use infrared touch screens with no extra layer. I don't blame you for not knowing about the Sony PRS 650 though, the story of that device is rather weird. It went out of stock worldwide around christmas, then I saw some stock trickle through and then lost interest. Still can't find it in stock and now apparently it's being discontinued with no sign of a replacement. It was a beautiful device a bit overpriced, but easily worth $50 more than the kindle. The new Kobo looks closest to it. Unfortunately the kindle trend is to get a bare minimum device, I don't understand. I would happily pay $200 for a quality reading device as should anyone who actually reads more than the latest Dan Brown.