After listening to the entire song, I can now finally say I really like it. It's a little odd trying to get used to the lyrics, though, as it's so flawless her going from French to Japanese, that you don't really notice it (well, I didn't anyway) until you hear her say "kokoro".
The instrumental is really well played out, and the instruments work perfectly together, and Utada's breathy vocals are good, I love her vibrato!
Hopefully, this has set the standard for her 4 other new songs, which hopefully will be the same (if not better!) standard of Hymne ? l'amour!

Am I also right in believing this is the longest song Utada has made (that wasn't a remix)?