The ability to integrate seamlessly with my existing ad server. There was nothing specific that I disliked about it, however there are certain features that could be made more intuitive (some of which have been requested by clients). It's worth noting that a customer support team has always been very responsive and helpful whenever we've needed them. I don't have any major dislikes at this time. It's just a matter of getting used to the UI and learning how to use the tool.
We're using it in an