Forget the sheer convenience of having thousands of books on a device no thicker than a pencil. Forget the robust, well-built hardware, which survives even the most careless of users.
The main reason why you should buy a Kindle is because it’s awesome to actually use.
Front and center of the reading experience is the delightful E-Ink screen, which can conservatively be described as a masterpiece of engineering. It looks just like printed words on a sheet of paper. Unlike many computer and tablet screens, it is readable in the sun. The latest version of e-ink screens refreshes almost immediately, so there’s little to no lag. The Kindle can run for weeks on end, whilst slowly sipping electricity.
Moreover, unlike old-school, dead-tree books, you don’t have to worry about bent pages, or bookmarks falling out. You don’t have to worry about accidentally knocking them from your bedside table and losing your place.
You can also highlight and share passages, without the pang of guilt you feel when you deface an otherwise pristine book. You can also see passages other people have highlighted, which I’ve found brings my attention to passages I’d have otherwise skipped straight past.