I love how easy it is to build banners in this tool. Working with templates and allowing other teams to translate or build their own versions is also easy. You can even push the banners down to your display platform like DOubleClick, etc... so i believe this will be the standard for the future in building html5 banners. I really don't see why companies are still using flash or gifs. This will help your CPC and click rate.
Ease of use, clean interface.
Not too intuitive. To find what to do one has to dig and actually click around. I didnt find a lot of trainning options.