I'm reading her essay/lecture book and I realized that I'm missing some of her previous CDs, so I picked them up. This one in particular was mentioned in detail in the book and I see (hear) what she meant. She uses many of her voices to sing the first song, and she does it so transparently. It's really pretty amazing. I picked the word "dynamic" because it is dynamic transformations.
Second song is more calm, and perhaps not as interesting.
One other thing I noticed is that after Under17 was dissolved, she jumped record labels almost every release. One previous was through Mellow Head, then this (Columbia), then later Avex Mode. I'm guessing that it's due to her strong minded personality. I respect that, and can even relate to that.