Not great. Comments are based on the Kindle app for a galaxy note 2 - some issues may be phone specific. It proved unintuitive to navigate the book. The search function was not useful at all. Maps would not zoom - rendering them next to useless on a small screen. The historical information left me wanting more unlike the Rough Guide (book) of Greece we used recently. Overall i couod have done without it. NB we did not use the hotels or restaurants though recommended.