Advances in technology have led to an increased presence of multi-touch interfaces in consumer products in recent years. Still, many challenges remain that designers need to face when designing for multi-touch interaction. As multi- touch interfaces are becoming more ubiquitous it is important to investigate not only their performance for certain tasks, but also the user experience of interacting with such interfaces. In this paper we discuss eight challenges that need to be considered when designing the user experience of multi-touch interfaces. The challenges also reveal potential areas for future research in the field of multi-touch interaction.