First and fast impression, just tried to convert a scene just to test, seems very nice, just noticed some names in the conversion got mixed (names with the material settings), for exemple in vray i got 2 materials, one with the name tree1 and other with tree2 after conversion the material with the name tree1 was the tree2 and the tree2 was the tree1, some others names got correctly converter others not.. other thing i noticed was the translucid materials (2sided vray materials), seems the conversion only activate the translucid channel and put there the color and texture, no difuse, reflect, bump etc was activated, it is possible to get a better conversion of the translucid materials? other thing is the bump scale conversion, till today i dont understand yet very well the scale of the corona bump, but i noticed the corona scale after conversion is exactly the same as vray, i have the feeling corona use a lower scale, since my tests till today with bump show me that i need to reduce the scale of bump to get a real material bump. Another thing is the opacity channel, i read the notes and yes i know is not doing the conversion yet, so will love to see it able to convert the opacity in the next builds. After all good work! it is already a big help, anyway i hope you continue improve the converter and if possible fix the things i said, no idea if is possible but i hope so :)
best regards