I think Music is truly one of the greatest modern Japanese albums ever. The rest of her stuff has been a bit touch and go though. My favourite songs are Oborodzukiyo~Inori, Legend and Kumo No Ito, it's almost like being transported to another world when I listen to those.
Is there any news on an album soon? I loved Life and Eien No Uta but not so much Sakura ~Hanagasumi~.