You won't be disappointed! Madonna is amazing live. It's not only her, but all the people she has around her---acrobats, dancers, etc. Also, all her special effects are great too. You should definitely go! My husband, my best friend, and I went to her show in Atlanta last year. My friend and I are the Madonna fans, but he went. He thought that it was one of the best shows he had ever seen. That is pretty strong coming from a guy who doesn't really care for Madonna.
