I like how easy it was to use once we got familiarized with it. It's very intuitive as well so there were no problems at all using this program. We've been able to track our mail in real time and also have access to historical data which has helped us tremendously when trying to figure out why certain pieces of mail aren't getting through. There really isn't anything bad about this product other than maybe the fact that you do need some training before using it but after taking advantage of their customer service team they will help walk you through everything you need to know! They're always willing to answer questions or even give you personal phone calls if needed. This helps immensely because sometimes things just don't make sense until you hear from someone who knows what they're talking about.