In this article, the researchers evaluated a residential addiction treatment program in Hong Kong called RESTART. The researchers compared 44 RESTART participants and 42 control participants who received treatment as usual from three treatment centres in Hong Kong. Participants completed questionnaires at four different times before, during, and after the program. RESTART improved participants’ belief in their ability to control their addictive behaviour. RESTART participants were more willing to tell others about their distress. They also thought their emotions and life were less affected by their addiction. The RESTART program had similar effects on all participants, regardless of their demographics, addictions, or mental health states.