Pretty good.
They refused to let me share one of my vocal recordings for testing, so here is it.
Additional:
After listening to it, some of the ideas that I was intending with these songs were kind of changed to fit a different feel than I was intending. I like them, but as someone who is extremely proficient at creating song, it's only as good as the AI can provide, but I think it's just easier for an experience to create something better.
I just see too many limitation that are worse then Soundgoodizer or OTT (don't know if they're still used these days), but I just don't know how you can beat an NGADM artist with AI songs.