I like the song a lot , I don't mind H/\L's arragement cos i'm big fan of their work for their own band and other artists like Ayu
Ayu gives a very emotional performance and that's always a plus. I don't personally her voice is too backed up , in my opinion it gives more power to the chorus.
I kinda agree that this song isn't something copeltely new , but I also feel it's new enough not to feel like a repeat. at least she's concistent on doing good music , but i'm sure she will try out some new things too.