Hey Leo,
I think this is my new favorite from you! There's a lot to like here:

The chord progression is very good, and the melody works very well with it! Put my name on the list of people who would like to hear the song with a human female vocalist! But apart from that, I thought this was a very good implementation of the vocaloid! It is very easy to understand, and overall, it really sounds pretty darn good!

The few places where the song paused on a held note from the vocaloid seemed a bit jarring to me... but not so much as to undermine the listening experience!

As I said, this my new favorite from you!