User interface is complicated and hard to figure out what you need to do. Their support leaves much to be desired (if you can understand them) and actually never seems to solve anything. A giant headache to set up your accounts and campaigns and apparently YOU need to intuitively know where to look to set things up. They don't tell you or indicate anything. You're just supposed to KNOW. Or figure out slowly the hard way. E.g. you have to set up specific destination urls for EACH ad that you upload. Even if they're in the same campaign, and the campaign's destination url is set to X. You have to individually change ALL their destination URLs to be that one. Otherwise they default to your homepage. It's been one giant headache from the start and I sincerely dislike working with them. Going to try to find something different.
