This is especially useful for women who have no waist. I was reading comments earlier on another blog and someone mentioned that Claire Kennedy has good information with photos explaining what works and what doesn't.
http://clairekennedydesign.typepad.com/
Scroll down through the February posts and her analysis of Dame Judi Dench's hits and misses with her no-waist body.
It's all about proportion and fit. I'm going to have to read all her blog posts.