Very flexible and excellent documentation

Ad-inserter is really easy to use and allows ads to be placed virtually anywhere on a page. You can either place ads manually, or in the case of Adsense, using the new “Auto-Ads” option allow Google to place the ads automatically on the page for you.
The plugin is also really well documented with examples for virtually any scenario.
I found it necessary to ask for help, and the response from the plugin creator was fast and accurate.
Definitely a 5 star plugin.