Watched Secret a few days ago and I rate it 4.8/5.0. There is no such thing as 100% perfect so it's pretty good. Those who have not watched it, you better do. The storyline is so unpredictable. Maybe it seems common to you at first, but you will have to wait till the ending that you finally realise what I meant.
That's all I can tell you. The simplicity of the story and the great melodies in this show will definitely win the hearts of those who are musically-inclined. =)