I own it too, and use the cards at least every session. I also bring them to other games and they've proven to be a big help.
In addition to the cards, you have several cut outs of various spell effect, (fireballs, rays, cones) all at different common degrees. Also spiritual weapons and lingering spell effect cards. YOu have a large map of tiles that looks like a dungeon. There's a small book and card to help track pursuits over short and long distances too.