Of the few episodes that I've seen, this show is very interesting. Although formulaic, it does certain things better than other series in the "Magical Girl" genre of anime. For instance, there is a conflict in the fact that although the heroine does her duty in destroying the evil forces, the police still come after her for the destroying priceless artifacts they possess in the process.
Another nice touch is the fact that creators actually provided a significant difference in the physical appearances of Kaitou Jeanne and her secret identity. Too often, the heroines in "Magical Girl" shows have followed the Clark Kent/Superman logic in that it should be blatantly obvious that the heroine and secret identity are the same person. However, Kaitou Jeanne and her alter-ego are distinguished by completely different hair styles. Still a minor change, yes, but more significant than most.