I'm not very good at writing critiques so I'm sorry if this isn't that helpful.
I think it's overall fairly realistic for VOCALOID. Some of the vibratos were a bit too, I guess you would say "strong"? It sounded a bit off for some of the song. I also think that there are some parts that sound like they might sound a bit better if they had low DYN (I think, I haven't used VOCALOID in a while and can't remember the params off the top of my head) and high-ish BRE, or XSY with Petit so they sound a bit more soft.