Does such a spy tool exist? I've tried Adplexity for mobile display so far, and found their user interface to be a PIA to use and navigate. Also slow service response times at Adplexity too.
I really want to be able to see keywords associated with an ad as well though, along with keyword volume while also being able to easily download the ads. Any recommendations? 
Thanks guys!
If you are considering native ads that are shown on mobile devices, then you can look at our SpyOver tool. We have a trial access of $ 1 for 3 days.
You can see in detail:
https://stmforum.com/forum/showthread.php?37950-SpyOver-presentation-of-a-new-issue-(Native-Spy-Tool)
https://stmforum.com/forum/showthread.php?37799-SpyOver-quot-Spy-Tool-quot-service-for-monitoring-and-analytics-of-native-ads
If you are considering ads only from mobile networks, then you can consider AdMobiSpy