This paper analyses the collaborative design of a high-technology product, a neuromagnetometer used in the analysis of the activity of the human cortex. The producer, Neuromag Company is trying to transform the device from a basic research instrument into a means of clinical practice. This transition is analyzed as a simultaneous evolution of the product, producer-user network and user activities. The network is analyzed as a network of activity systems. Each activity has a historically formed object and a motive of its own, as well as a system of cultural means and expertise. We use these to explain and understand the interests and points of view of the actors in relation to the product and the contradictions of the producer-user network. It is suggested that the emerging user needs of collective actors must be analyzed at three levels. At the first level, the use value of the product, its capacity of solving the vital problems and challenges of developing user activities, is charact...