This paper contributes to the 'reflective turn' in academic research on the EU (AREU) by asking: is AREU useful to EU policymakers? The findings come from a survey of 57 Commission officials of mixed ranks from 15 DGs, and 45 indepth interviews with mostly mid-level officials from 22 DGs and the Secretariat General. Officials value AREU's data, concepts, and methods for specific endswith differences across ranks, roles, and personal inclinations. Accessing AREU through multiple venues, they leverage it pragmaticallyto improve their work's quality, boost its credibility internally and externally, and justify it publicly. They feel their Commission colleagues use AREU, albeit to a lesser extent. They see several institutional features of the Commission as conducive to AREU: 'positive' ones (technocratic freedom, evidence-based expectations, a multinational staff) and 'constraining' ones (scarce resources, subsidiarity). The conclusion highlights the interviewees' desire for more integration of AREU into their work.