Within the scope of the High Performance Center Mass Personalization, the term Business to User (B2U) was created in addition to the classical terms Business to Business (B2B) and Business to Customer (B2C). B2U describes the shift towards absolute user-centricity and this is exactly where the B2UXLAB comes in. Novel concepts can be validated and tested at an early stage. Not only technical parameters, but also user experience and the general evaluation and acceptance by users and user groups are examined.