I enjoyed working with both of them over at CCO! They are very knowledgeable in regards to our industry as well how they can help us grow ours within theirs too!! Nothing really comes up when dealing or talking w/ these guys. We have been able solve issues we had from time 1 till today without any problems. ! The best thing about this software is its user interface which makes it easy to use even if you are newbie in digital marketing world. It has an awesome dashboard with lots of features like CPM bidding option, dynamic ads insertion and so many other options. I would say there isn't anything bad when using this tool as everything seems great from my point of view. This service helps me to track performance of each campaign and also gives me report after every month.