I have FaceShop Pro and like it!  It's not perfect and does need attention to details like placing points - and the better picture you start with, the better the result (GIGO!) and yes, I agree that the texture map benefits from some editing after being output, but this is a lot easier than starting a texture from scratch!  Approach it as a unique tool that is easy to use and can produce some useful output and you can have a lot of fun with it!  Here are some example of what I have done with it:
http://www.renderosity.com/mod/gallery/index.php?image_id=1496200
http://www.renderosity.com/mod/gallery/index.php?image_id=1494058
http://www.renderosity.com/mod/gallery/index.php?image_id=1496712

I would not have produced these pictures without FSP.