“…Investigations of client perspectives have found high acceptability of CM to clients receiving treatment for smoking, cocaine addiction, and alcohol consumption [ 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 ]. Recently, Getty et al [ 29 ] adapted provider questionnaires to produce the Service User Survey of Incentives (SUSI). London based service users (N = 181), most of whom had no prior experience of CM (92.3%), completed the SUSI.…”