The first few volumes are a bit slow paced, but observing the development of Ai's powers and his relationships is very interesting. The plot does heat up soon enough. However, the ending to the series was a bit of a let down for me. Some unncessary plot turns were made and the final chapter was not too fulfilling. The characters themselves were good and the story idea was good as well. A bit more effort could have made this a great read in my opinion. Its excecution simply happened to fall short. This may be worth sampling for the casual reader, but if you absolutely must try something by this author, I would recommend taking a look at Katsu Aki's rendition of The Vision of Escaflowne. Although an early work, it's a very enjoyable read the entire way through.