I purchased the 505 before the library borrowing feature was available. Once it became available I am saving so much money by not having to purchase books. Before deciding whether the Sony 505 is a device for you, check your local library's selection of pdf/epub and mobi books. Look at some of your favorite authors to see what is available. Make sure there is enough of the content you want before making a purchase.
Some people have libraries that do not have a very good selection of ebooks. If you are reading popular fiction and your only option is to purchase it is difficult to beat Amazon's $9.99 bestsellers.
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