I selected the Sony PRS-350 because I wanted to borrow books from the digital library in this area. Can't say I'm crazy about the selection overall but I have found some things I like. Have checked out a couple of free sites but nothing as yet appealed to me, though will check back.
Don't want to have to buy every book I read; wanted a device that was just a reader [also like my cell phone to just be a cell phone] and so far am very happy with the PRS-350. Didn't think of it when I bought it, but it is such a nice compact size that I plan on taking it with me on vacation next week; may help kill some time at the airport