The story is really picking up here, pushing Naruto, at least, to the limits of what he can do, mentally. It requires a whole lot of guts and a whole lot of guts (and a dash of blinding stupidity) he has. Not much actually goes on in this volume when you look at it, only set up for the arc, but there is a brilliant sense of tension throughout--as well as explaining what it takes to be a ninja and how much teamwork is required. You either pass or fail with the emotional strength of your nakama.
In short, I really liked this volume and blasted right on through. There was a tendency to overtalk. I know Kishimoto is setting the world and the stage but sometimes I think he explains too much. But that's neither nor there. It doesn't really interrupt the flow of the narrative and the story is excellent. Also the art is improving as well--though they all look so young!