 The PSQ is a self-rated questionnaire which assesses sleep quality and sleep disturbances over a one month time interval. The RLSQoL is an 18-item scale that assesses the impact of RLS on daily life, emotional wellbeing, social life, and work life. The ESS is an assessment used to measure average longtime sleepiness whereby subjects self-rate questions on how likely they are to fall asleep in eight different situations. The PSQ, RLSQoL and ESS will be recorded at Baseline and at the end of the Treatment Period and at the ET visit, if applicable. 