A customer relationship management (CRM) application should make your life simpler not more complicated. Heap is designed to be simple. It has simple functions like messaging, calendars, and contacts; but it ties them all together so you can see the relationships between these items. You can easily run reports on this data, or if you wish, export the data.
Heap does what you need then gets the heck out of your way. If you would like, go ahead and click on the images above, they are screen shots of the application in action.