National Specialist Family Service (NSFS) helps parents who are substance abusers to overcome their addiction and get their children back. It teaches them family skills such as budgeting, routine, and creating play time. NSFS has had enormous success both with successful graduations, and families who stay together. This report examines the service and finds that children benefit from spending time with their parents, even those that only spend a few months with them. It confirms that a placement in the service is safe for the children. It also demonstrates the value for money that NSFS represents - with a Social Return on Investment ratio of between 4 and 6 times the investment made.