I absolutely love it! In my opinion it's better than ULTRA BLUE.
as with the maturety of the album, Hikki said in a recent interview that Boka wa Kuma made her losen up for HEART STATION. so that's why it's less serious.. And I can't wait for her next English album!!
she is seriously working on it right now!!
idk if Sanctuary is on it though...
Maybe it will future the new Kingdom Hearts soundtrack, since a new Kingdom Hearts is going to be released soon. (not sure if she going to do the soundtrack again though
)