In an examination of the main provisions of Directive 2005/29, the solutions adopted for a number of the key design issues are assessed. First, has the Directive overcome the problem of the inherent vagueness and unpredictability of a general clause that forbids unfair commercial practices? Second, is it the case that the Directive has no implications for contract law and competition law? Third, will the provisions requiring maximal harmonisation lead to a decline in consumer protection in some Member States? Fourth, will the new comprehensive duties to provide material information prove workable and affordable by business? The article also assesses the degree of protection afforded to vulnerable groups, and the extent to which the Directiv...