Design of product makes a lot of difference in how far any product (or person) will penetrate in the market.
A book may be good. But if cover is not attractive it may not sell well.
Because, most people tend to judge a book by its cover.
Same thing is about a person. His presentation, the way he presents himself to the works, makes a lot of difference.
Same thing can apply to a product or anything else where "People Judge Before They Buy"
The book cover matters a lot. It is necessary to impress people.
(C)Haresh Raichura - Lawyer in Supreme Court; On twitter @hareshraichura; Profile on LinkedIn