How great is this book, and the datasets? This is the reason you should buy logos over any other software program. This is a book that changed my life forever. Everything I ever taught on the NT before reading this book, I threw away. I'm far more able to trace the argument and flow of a passage; I'm able to emphasize what Paul (for example) emphasizes, and not make a huge point out of something small. I'm much closer to reading Paul as Paul. I use commentaries far less frequently, and when I do, I'm far more unhappy with them. My teaching is better, and my lessons/sermons take hours less time than they used to. Between this, and Buth's chapter on participles in The Greek Verb Revisited-- it's night and day from what it was. It's also made me far more aware of how I teach,and I find myself using things he teaches. The bottom line is this: Buy this book.