Thanks so much for your input.
Yes, it looks great in Kindle Fire, Kindle Fire HD, and Kindle Fire HD 8.9". The Paperwhite kind of breaks things up on some pages, forcing text onto the next page. The regular Kindle (which I guess is the old original Kindle), and Kindle DX look terrible. Both the Kindle for iPhone and iPad don't seem to recognize page breaks, and break things up. But the Fire, Fire HD, and Fire HD 8.9" look very good.
So I'm guessing from your response that once we finalize the books (it's in five languages), they'll work fine once uploaded to Amazon?