The Kindle (and ebook in general) debate is a fierce issue these days. For the longest time I was on the "Against" side.
But then my mom got one and I got to mess around with it. Later, a friend sent my sister and I an older version for us to use. I'm the one who mostly uses it though ...
Now I can honestly say that I am a thorough Kindle supporter. I can't say anything about any of the other ereaders, but I do love the Kindle.
1. Font size control. I like to have my Kindle set on smallest possible print size. My mom, on the other hand, has bad eyes, so she uses a larger print. She can't read print books anymore, but she loves the Kindle. My mom also says she likes that there is no curvature to the page.
2. Small. My Kindle has over three hundred books. Mom's has ... over a thousand, I believe. Imagine trying to carry that many books around in physical format.
3. Forces me to read the book in order. I have this horrid habit of skipping ahead, and this sometimes leads to me missing large portions of the book. Reading on a Kindle forces me to read a book in order.
4. Free Books. Most of the classics are available for free on Kindle, and many authors (such as myself) offer their books for free on occasion. I can glean plenty of books this way.
5. Email feature. It costs too much for me to print out my books so I can edit them that way, but I can send them to my Kindle and it has pretty much the same effect.
6. KDP publishing is free. 'Nuff said.
Of course, I do miss the smell of books, and my Kindle has two spots on the screen and likes to freeze every other day ... but all in all, I actually at times prefer a Kindle. Physical copies are best for re-reading, but Kindle is best for initial reading.
Note: I'm not trying to change anyone's opinion of the Kindle, I'm just stating the reasons for my change of opinion.