Historically, it has been difficult to measure the effectiveness of marketing campaigns because target markets cannot be adequately defined. Email marketing carries the benefit of allowing marketers to identify returns on investment and measure and improve efficiency. Email marketing allows marketers to see feedback from users in real time, and to monitor how effective their campaign is in achieving market penetration, revealing a communication channel's scope. At the same time, however, it also means that the more personal nature of certain advertising methods, such as television advertisements, cannot be captured.
Thanks Kelly, Mailchimp have definitely come a long way with their UI over the years, it’s just their service that hasn’t caught up ;) I haven’t had the chance to play around with Pure360 as much as I’d like, but I’ve heard the same things echoed by several friends who use their service. Looking at their client list, I think they’re more aimed at large companies though.