I tried for the first time to use a city guide in a digital version.
It is not usable as a guide. You can just read it as you would read a book about Tokyo, but when it comes to being a handy, simple way to guide you to a certain place, it is absolutely useless!
For example, the included maps are shown on the kindle 3 display, in a much too small scale, so you are unable to read them. You also cannot zoom in (as you could, in case it would be a PDF file!. If you try to set the font bigger, the graphic part does not change at all.
In a book format, the lonely planet guides are quite good organised. In the digital version, you never knew where you really are, in which section of the book. You have no index with the position of the maps in the book. Illustrations were generally completely missing, quite different to a paper version of the same guide.
All in all, very very dissapointing, useless for the intended scope!