James Webb Young is a copywriting legend. You should read his ads to realize how problem focused ads work better than benefit focused ads.

You first have to raise the problem before you list your solution and benefits.

His full page ad: "Curve of a Woman’s Arm"

http://books.google.co.in/books?id=YC6YKYyHVKwC&pg=PA30&...

(If the above long link doesn't work, go to books.google.com and search for the book "The 100 Greatest Advertisements: Who Wrote Them and what They Did" - the ad is on page 30.)