The Kindle Edition is great! It speaks the text to me and I can adjust the speed! It's automatic, I don't have to do anything. It's great for studying. I listen on my kindle fire, but often times I'll follow along on my macbook pro, because it has the retina screen, so it's easier to read along and blow it up nice and big, but for voice to text, kindle fire is awesome, but you need a kindle edition to do that. Macbook pro is a major pain to do text to speak on.As far as this textbook is concerned, it's fine, you just have to plow through all the fluff on breast-feeding. It's major over-kill and it is all over the book. There are no answers to the end of the chapter questions that come with the book! So, unless you buy it brand new and you have the code, you don't get the online questions, with answers and rationales. Although, I got that code from my hardcover textbook, so I don't even know if you get it with the kindle edition or not.