“I finally got myself an iPhone, … and it is reeeaaally nice! Perhaps not the best phone on the market but using it is a real joy. One of the great things about it is that the interaction feels so smooth and sweet. It made me wonder what makes it so nice. One of the things I want to show you in this article is how this actually works in practice and what makes it such a good user experience.” (Martijn van Welie – Thoughts on Interaction Design)