This article reports findings from an evaluation of a Global Positioning System (GPS) pilot that took place in the Cardiff Integrated Offender Management Unit (IOMU). The evaluation was based primarily upon qualitative interviews with about half of the tracked sample of offenders, plus interviews with key stakeholders from the IOMU, police and courts. The findings revealed a general consensus of positive views from both offenders and practitioners about the experience of GPS tracking. However, these generally positive outcomes were clearly related to the voluntary and relatively targeted nature of the pilot, which would be challenged if/when GPS tracking was introduced more widely.