I actually purchased this product and a different edition along with it so that I could have something with me when I travel and something with my regular devotional materials when I'm at home. I found the introduction compelling -- it set the stage about the writing and helped me understanding the background of the book. It has been an enriching addition to my daily devotions.
Every single day's devotional throughout the year carries with it a special something that unlocks the secret places of the longing of the heart to connect to God ever more deeply! I carry it with me everywhere I go.