The ability for me to create my own lists of prospects by choosing from multiple criteria that I want them matched against, as well as being able to filter down those results with different search options was very useful! It's also great how easy it is to export your leads into other programs like Excel or Salesforce once you have built up enough contacts in one place so they can be easily sent out via e-mail campaigns. Nothing really - just make sure when creating filters/criteria there are plenty available choices! We were using this software at work before we went live but didn't realise all its benefits until after going through training sessions where our team used it extensively (and loved).