The best experience I had was working with one of their sales engineers to set up the overly complicated direct mail campaign. He was very willing to help get things off the ground, which was appreciated. However, I don't think this should be a necessary part of their flow b/c the product itself should interface better with their core customer: marketers.

Like the breakdown of spend in the Simple Area Mail - Areas tab.

The simple integrations with products like Autopilot. The ability to customize and send beautiful mail in a matter of minutes.