I have both and what previous Sony reader owners will discover in owning a Kindle, eventhough Amazon boast having 244,000 books, most new release will have 'not yet available' tag and it can take weeks before you can buy the book, while every other ebook store has them available the DAY of release. I'm impatient and have not bought an Amazon book in over 2 months. If it was not for this board, I would be very frustrated; I just buy my books at CyberRead, BooksonBoard, & Fictionwise. I rarely use the Sony ebook store (eventhough Sony is #1 for uploading books the day it comes out, they even upload at midnight on release date
and on weekends), I usually don't like their prices and the LRX format is a deal killer. Amazon takes too long to make books available so I buy most of my books from outside vendors except when there's a big discrepancy in prices, then I have to practice patience and wait for Amazon to make the book available weeks later. I would not have noticed if I did not own a PRS-505 11 months prior to buying a Kindle.