It makes my heart ache a little, because I am deeply attached to my bookshelves. I'm a compulsive re-reader, so my books may look abused but they're really just very well loved.
But I have to admit that having multiple book options (without the load of multiple books) is working out pretty well for my daily bus commute and for traveling. And the holder I got has a built in reading light that automatically shuts off if I don't turn a page for a while - a pretty big bonus for D, because I'm immune to light and always just fall asleep and leave it on, forcing him to get up and turn it off hours later.
After lots of back and forth debating, I finally decided to get the cheapest version that comes with advertising screensavers - it's a pretty measly discount, but I can't ever get over my impulse to get the best deal possible. You don't see any ads while you're reading, just when the Kindle is off (this was NOT clear to me when I was purchasing - I would think if something were off, you would just have a blank screen). If I didn't have a cover, this would drive me batty, but since I never see the screen unless I'm reading, I'm fine with it. EDIT - Sorry! I was wrong about this - if you hold the power slide over for at least 5 seconds, the Kindle will actually turn off and you won't see the screensaver. If you just let the Kindle fall asleep on its own, then you will see the screensaver. It won't turn off by itself.
Currently, I'm only using it for library books (and for a nice back up supply of my favorite classics that are available for free). Anything that I love enough to buy would be purchased in print, because it doesn't seem real to me unless I can actually hold it. Clearly, I'm conflicted. But mostly, I love it.