Yes, I know I should've said something earlier, seeing as how I commissioned it.
It looks fantastic. I particularly love the essences of the ghosts lingering above the girls and the zonked-out looks on the girl's faces.
The world needs more Test sisters fanart
The very reason I had this done.
Also interesting is that there was an episode (which I didn't know about when I thought of this) which borrowed pretty heavily from "Scooby-Doo", and the girls didn't believe in ghosts. I bet they believe now.