The Cobra AMP irons have advanced material placement, but for me they offered advanced ball placement.  I had these in the bag for much of the 2012 season and shot some of my best scores.  My handicap went down because I was hitting the ball consistently closer to the hole with these irons.  No fancy chart was needed, shorter putts and lower scores is the bottom line I was looking for.  They are bright and bold, but they work.  Great feel, decent forgiveness and pure accuracy.  For the full review...here!!