Both Microsoft Dynamics CRM and Sage ACT! Premium are excellent products and are leaders within their niches. ACT! has moved in recent years from simply being a Contact Management software towards becoming a CRM. Although ACT is much more customizable than in the past, it is not built for workflow and additional main entities. What it does, it does very well. And that is a focus on quick and easy management of Contacts. Sales reps who are on the phone all day long are often very pleased with ACT. Yet sales reps who are looking for more flexible customization, mobile integration or cloud access will be more pleased with CRM platforms such as Microsoft CRM, Sugar CRM or Salesforce.