What is User Experience Design?

I believe user experience (UX) design is something technical communicates need to be very aware of. According to Julie Celia, “[t]he spectacular success of companies like Apple has proven that a great user experience makes the difference between lackluster product performance and market dominance.” See Julie’s complete article at http://www.cooper.com/journal/2012/11/what-is-user-experience-design.html.