I just tried the plugin, after seeing the Pro version on codecanyon, and I have to agree with @nretter. The docs are sparse and there’s zero info there for programmers. I couldn’t even activate the plugin until I fixed 3 bugs in the init code. Once it was up, I had to choose whether to allow the plugin to spy on me using freemius. Clicking the Skip button, did nothing. So I clicked the I Agree button, which worked naturally, so I could at least see the plugin’s interface. The parts that weren’t broken looked nice. I tried to add an event, but was met with so many PHP errors, warnings, and WordPress deprecation notices that the page was unusable. Same for the settings page. I saw very little by way of customizing the output HTML, a lot of it was hard-coded with no filters or overridable templates. Searches for hooks revealed very few that weren’t just intended for internal use. Most of the code seemed well written otherwise, with some really old crufty bits in places, and some SQL code that really needs to be updated to using ->prepare(). It could also use a reduction in the number of front-end dependencies it’s loading, I counted 16 between the CSS/JS files.

Also, the first review is by the plugin author…