Unfortunately I cannot rate this plugin above 2 stars because it is not compliant with Google's new Ad Experience guidelines for interstitial ads.
As a result, you cannot serve DFP (a.k.a. Google Ad Manager) ad tags with this plugin. If you do your creative image will be flagged by Google as a violation.
Looking elsewhere for another plugin that is up-to-date in this area.
If you need this for simple static images with no tracking, it works fine. But if you need analytics, not so much.