Except for tracks 5, and 11, all the other songs are already available on her other AniSong album. However, tracks 6 through 10 are full tracks on this CD, whereas they were just part of a mega-mix on the other CD. And they're different versions to boot. I really do appreciate the ballad version of "ai - oboeteimasuka" on this CD. So I guess it's not such a bad buy. However, that doesn't change the fact that it's a bad marketing tactic to play games like this with listeners who pay for the stuff.
On top of that, mixing is all over the place. Some are decent (4-stars), but others are below my purchasing threshold (2-stars). I can do a lot of mixing quality comparisons of her songs because I have so many different copies of them from so many overlapping tracks on different CDs (see first paragraph), and they're all different, some vastly. To me, it's an indication of contempt for the art, or just pure incompetence. Combined with the first problem, it's too much for me, so, as unfortunate as it is, I'm going to stop following her work.