We have 3 in the house - one each!
Mrs V has read more books than ever, and we don't have them sitting on the bookshelf afterwards!n Great for reading in bed at night when she can't sleep - she has a little light, so I can snore away happily!
Daughter V is doing an MA in Creative Writing, and has books on her Kindle, good for when she's travelling.
I found it a bit odd at first - you only see about 2 or 3 paragraphs at a time, but I'm getting used to it now.
Kindle book torrents can be downloaded - there are thousands of titles - a pal has 6500 and counting!
One downside is lack of colour for graphics, but there is a PC version of Kindle reader if there are lots of pictures.