This report describes the background, methodology and major findings from the first qualitative study of Ecstasy use in Northern Ireland. Data were collected through in-depth interviews with current or former Ecstasy users (N=98). The interviews focused on issues relating to first, last and usual use of Ecstasy, positive and negative drug experiences, drug use rituals and norms, health issues, and related aspects. Demographic and drug use history data were collected at the conclusion of the interview. Supplemental data were collected through on-site observations in selected club venues. The report includes a description of major findings and a discussion of policy implications.