Good fun stuff as long as you can suspend some disbelief. I find it interesting that the Jack Reacher character has a moment of severe guilt and depression, and yet it doesn't _feel_ as if he did. He gets back up, starts truckin', and all the problems from before seem to melt away, even though the author specifically puts little reminders in the text as to what is motivating Reacher. 
 Guess it is just the writing style; great for flash-bang-fighting and explosions, but not so great for emotional impact. Actually, I should clarify. It's not great for certain *kinds* of emotional impact. The ending is a great example on how to drag a "....nuuooooo" from the audience.