I agree, it's an amazing tool, I bought it a few months ago and it's really great fun to use, tough I'm a long way to know all this soft's features (Andrew is the man that doesn't sleep, developing new tools and functions faster than I can try them). Very user-friendly and excellent feedback from his site, too. I posted here some things textured with 3D-Coat, if you want to see:
http://www.renderosity.com/mod/gallery/index.php?image_id=1735690
http://www.renderosity.com/mod/gallery/index.php?image_id=1595928
http://www.renderosity.com/mod/gallery/index.php?image_id=1594826
http://www.renderosity.com/mod/gallery/index.php?image_id=1684595
So you can see it works fine for Carrara, too.
I plan to texture my newest critter (see gallery) with this fantastic tool this afternoon...
Just try it...incredible!
Have a nice day
Eric