I've had decent luck using LUUV as long as I triangulate my model first (the triangulate object button is in the same group as the quad divide one).

If there's a "hole" in your model LUUV will warn you and ask if you want to triangulate. I became very frustrated because the conversion to OBJ didn't work very well.

Then I started triangulating first and it seems to work a lot better.

Just my two cents.
, fGeorge