I recommend the Fire, but only in situations where you will be saving a significant amount over paper editions of the same text. (ereadertech.com)
What's the point of doing all that, of linking to other book sellers large and small, if readers won't buy from them, even for paper editions? (harryjconnolly.com)
And then only when the book is in mass market or trade paper editions. (deanwesleysmith.com)