Campaign Management: Awesome capability in automating and segmenting campaigns. However, automating and segmenting are minor compared to the marketing intelligence provide via tracking and integration with SiteCatalyst. Knowing our demography and behavior has influenced innovation to tailor our content to the needs of the target audience.
Overall this system has improved Mercola from a batch and blast shop to being able to personalize marketing to a demographic or individual level.
Simplicity of the UI for a technical tool. If you are doing email marketing, this is a must-have tool.