Barnard et al. [2] conducted an empirical comparison of use-inmotion scenarios for mobile computing devices. They pointed out the importance of choosing the right evaluation method which suits the chosen mobile computing scenario. They show that a controlled walking scenario as well as a treadmill task may be appropriate depending on the study objectives. They argue that the usage of a treadmill is suitable to analyze performance aspects, whereas it seems to be not sensitive enough for finding contextual factors. This is why, in order to achieve more realistic measures in terms of performance, accuracy and workload, a walking scenario should be used.