What Peter Merholz and Brandon Schauer did in their book “Subject to Change” is getting things straight through examples and basic notions/steps when it comes to product and service design. A compelling walk through ideas and shared experience.
In my last trip to Germany I decided to purchase finally a prepaid SIM card for my handheld. Since, I travel often to the country, it only sounded natural to me. So, I went in the first shop that was open on a Sunday (e-Plus was my luck) and got one. What I didn’t realize was that I was in for a trip, that if I knew in advance, I wouldn’t probably like to take.