I love my Kindle. I downloaded a bunch of books off Project Gutenberg and it's a lot easier to read in low/no light situations; definitely get an e-ink one or whatever though, so much better than a troutty screen.

eReaders also have the benefit of being able to just, erm, download books. If you're financially challenged, that is. Just remember to support your favourite authors when you can -- being a writer is absolute bollocks.