Although I hated to do it, I bought both hard copy and Kindle versions of this Frommer's guide, the first because I find it best to page through a book to find what I want and the second to lighten my load and still have everything at my fingertips while traveling. On my iPad, I found the guide very easy to navigate using the Kindle app; there's no way I would have used this on my Kindle Touch, however, because of the interface and black-and-white e-ink. (The Kindle Fire and other tablets probably also make good use of the format.) The color photos in both versions are beautiful.
As for content, the guide was very good at directing me to visit places I wouldn't have otherwise considered or known about. It covers all the islands, but, as a result, doesn't treat any in depth, although I was still surprised by how much information the guide contained about each. (If you plan to visit only one Hawaiian island, you're much better off getting a guide book that focuses solely on it.) It's always fun to see how many "Best Experiences" I can check off on my vacation, and the suggestions are usually spot on. I used two hotels suggestions, one in Waikiki and one on the Big Island, and both were memorable even though they were in different price ranges. Even the restaurant suggestions, usually a weak spot in guides, were good, although I cross-checked our eventual choices with TripAdvisor and Yelp.
This guide provides a solid overview of all the Hawaiian islands and their differences, activities, and sights.
-- Debbie Lee Wesselmann