Agree, the very first episode was awesome, the revelations and Tutu's first appearance were impressively done, although I was at first really stunned with the whole ballet thing and didn't know what to think of it. The next few episodes are rather standard mahou shoujo heart piece of the week episodes but the background and setup of each episode as well as all the ballet scenes make up for that.
The ending of the first season is very good, although I felt it was a bit too usual, good wins against evil, the princess gets her prince, etc.
However, the second half, oh wow, one rare gem amongst tv series, with an impressive, well developed and well written story.
About the only thing I disliked about the series was the very ending for Ahiru herself who turned back into a duck and stayed behind with Fakir, had hoped for a bit more of a closure for the two since they became my favourite characters throughout the show.
fucking guitar ninjas, also can't get enough of Hold Me