I love that it is simple to use for our team. We can easily create multiple tags, assign them to products, and add them to emails to help track performance data. The analytics are pretty basic but nothing wrong with that! As an agency we're looking at how we can use this tool more effectively and make it more of a reporting system than just a tagging engine. It's a great tool. There isn't anything really bad about it. I think the analytics could be better and perhaps provide more detailed reports. It's been easy to get set up and integrate into our workflow.