Very disappointed
I purchased this deal, because I wanted an events plugin that didn't require me to also buy a bunch of add-ons for basic things like allowing participants to RSVP or buy tickets.
One thing I really liked about the plugin is that you could sell tickets by simply installing and activating WooCommerce without needing to create a product for every event that has tickets for sale. You do have to set up a payment gateway, but there's nothing else to do in WooCommerce aside from setting up the payment Gateway.
It also looks really good on the frontend once you create an event.
However, I have tried EventIn on three different client sites and had to remove it, because it simply does not work properly. For example, all of a sudden the ability to go from tab-to-tab will stop working, and the only way to fix it is to right-click on the page, go to Inspect > Application and then clear local storage, session storage, cookies and clear cache storage. Doing all this logs you out of your site. When you log back in, you can then go from tab-to-tab once or twice, and then you're back to not being able to go from tab-to-tab and having to clear everything again.
One two of the three sites where I installed/activated EventIn, it caused conflicts with other plugins. These are sites that have been live and working without issue for several years, so it didn't make sense to me to change other plugins to deal with the conflicts with EventIn. It just made more sense to remove EventIn.
Since my return window has closed, I'm hoping the developers continue to put in work on the plugin to get it to work well.