For years, I resisted the urge to buy an e-reader. One by one, I saw my friends and family embrace them, but I was attached to the tactile experience of old fashioned books. When I started doing a lot of traveling for work, I reluctantly ordered a Kindle just to reduce the weight of my carry on. I've never looked back. The convenience of carrying my entire library in my pocket is enough to keep me hooked. But the fact that I can buy a book (or check one out from the library!) and instantly start reading has completely changed the way I select books.
While I love paper books, sometimes you need something more specific. I absolutely adore reading on my Kindle Paperwhite. It's light, had adjustable backlighting and the new waterproof feature means I can take it anywhere without worry. I love that's it's small enough to toss in my purse for my bus trips, and light enough I can read in bed without hurting myself when I inevitably fall asleep and drop it on my face. The battery lasts forever too which means I am never without my book. I have the ad-supported version and wouldn't hesitate to buy it again. The ads are very unobtrusive and I never even notice them.
I bought this 5 years ago and not use it very often, BUT I recently go minimalism so I decided to not buy paper text-heavy books and use Kindle instead. This is really working. It's small so you don't feel this is a burden to carry or read. You can basically find every book you want on Amazon and read it on kindle. I really like their vocabulary checker feature since I'm not native speaker. Now I use it 7 days per week and I found myself re-love reading now!