I have a few e-books and like the Microsoft Reader versions the best. They allow bookmarks, notes, etc. and it "looks" like a book on the screen. It will also read to you in a robot voice, which I do not like. However, given a preference, I prefer print books. The vacation thing is true, though - very convenient and doesn't take up space. I don't like the Adobe PDF books near as much. I've downloaded some freebies though - and for anyone wanting to give it a try, Ted Dekker's newest Book "Obsessed" is available for free as an ebook, as well as "Black". Great reads, even if you aren't a believer. Good tension, great mystery, loveable character, and a sense of urgency. I have the hard back of all his books that come in hardback.
www.teddekker.com.