The co-creation workshop in Katowice concerning discussion on the concept of the demo site in the market place has shown that the detailed analysis of the proposed solution at the meeting with participation of various stakeholders was necessary and has brought several conclusions. First of all the co-creation process including successive steps aiming at achieving the final solution acceptable by all parties is a challenging but indispensable approach. In case of the Katowice market place it has come out that not only the analysis of the concept but also the visit of the site is necessary, because we have discovered that the location of the NBS is conflicting with the pedestrians route used customarily. As a result the concept has to be revised and discussed again at the next meeting.