I've read a handful of books from the Library in PDF format on my Sony Reader, and it's fine. Not perfect, but definitely worth "free." In one book I read, they had 'call out' boxes in the middle of the 'regular' text...that freaked the reader out a bit, and I had to change the font size to compensate. But, that being said, the Library is my preferred method of getting books. You can't beat free!
