I just got back from a trip to hawaii, and still bought the Kindle version of the LP guide (and another) while there, rather than a physical print book, because I could do it from my hotel room without putting on pants the day before picking the next day's activity. A secondary consideration was 3 less things to carry around.

The books really could have been vastly better -- there were some clickable urls (when viewed in the iPad 3 kindle app)