I'm planning a trip next month to Copenhagen and Berlin and I thought how great it would be to have kindle travel guides instead of lugging around 2-3 DTBs when touring the sites. (Unfortunately unless you're planning a trip to Paris, London or Italy, your choices in Kindle guide books are rather limited.) Has anyone used a Kindle guide book (Frommers, Rick Steves, etc.) while traveling? Was it as easy to use as a "dead-tree" guide book?