I've used my Le Creuset enameled cast iron cookware for over 10 years; I'd be lost without it. The excellent heat retention and even heat distribution allow you to cook over low-medium heat; you'll save energy and your cookware will last longer. But who am I kidding?--I bought my Le Creuset pans because they're pretty and oh so French! That they're energy efficient, sturdy, and easy to clean are just bonus points.
Although I own a set of the cobalt blue pans, the heart shaped red pan with lid is my favorite Le Creuset piece. It would make a great Mother's Day or Valentine's Day gift; then again it would make a wonderful present to yourself!