Dunkel GmbH is one of the Internet pioneers in Germany and has been providing reliable Internet technology for companies for 20 years. Their challenge is to combine high-availability hosting with maximum flexibility for customers. They chose VMware to overcome this challenge. They implemented Virtual Data Center Service based on VMware vCloud, flexible, usage-based billing, four vCloud service classes and additional managed security services. The results of deploying VMware were conversion of all hosting services to vCloud Powered solutions, four service classes to cover different customer requirements for availability and service, transparent, usage-based billing models and virtual data center combining security and high availability, with the customer having complete control of its infrastructure.