Gosick is a very interesting anime based on its manga. Full of mysteries and drama that the two main characters Victorique and Kazuya never fail to overcome. It isn't aimed at those who are interested by detective stories, it is made to be interesting to everyone who likes lolis, romance, drama, war, and the supernatural. I haven't finished it yet but I look forward to it.
In the end, I must say, you better watch it...or else! (You'll miss out)