I like that we can use our own ad server for display ads (for example) as well! Also it's easy to set up campaigns using API calls or CSV files - which makes managing them very quick & simple compared other providers out there in this space such has Google Ads 360/AdXpress etc where you need more technical knowledge / experience if your not already doing so before hand..
The only thing i dislike about ADM atm are their billing cycles but they're working towards resolving those issues now too! If its something else please do let me know because all of these things have helped us improve performance by leaps an bounds since switching over!! We've been able t oeasily create targeted landing page content without needing any coding skills whatsoever either :D This means everyone within my team knows how each piece works even though some.