Dire.
To do this justice I would have to go through every part of the collab and review it, but there is only one part that's worth mentioning. Diamondz part was the only part of high quality and the rest was pretty rushed and badly done.
I don't have much more to say about this flash, it was unenthusiastic and the lack of quality animation reflects this.
Lastly it's Utada Hikaru, not Utadu Hikaru.