Here's a success story on personas and their problems. Skullcandy makes headphones designed for snow boarders. Because they involve their personas in the product design, they get products that snow boarders want to buy and they tell their friends. To the tune of $85M in revenues.
Watch the video on MSN.
Lessons: Immerse yourself in your personas and their problems and you'll design a remarkable product. But it's not just about design, it's about careful marketing through the right distribution channels.
Thanks to Alain for sharing this video with me.