Hello,
I just found about this great nifty tool :)
All i did was I brought up an old and incomplete Vray scene I had, and used the Scene Converter I found here on the forums, turned lights to Coronashadows! (Replaced VrayLight Planes with Corona's) (Scene total conversion took less than 3 minutes) !
And Hit render ! I didn't really calculate how much time I left it to render but its between 20 to 25 minutes!
The result is not that photo-realistic but then again never did the Vray one, but I expected materials issues/light/rendering glitches and low quality for 20 minutes ! I was completely shocked ! in fact some of the converted materials look even better in Corona !