Disclosure: I am the developer of this plugin and thus obviously biased.
I developed this plugin because I wasn't satisfied with the other options out there. I developed a related plugin in the past called "Qoate Scroll Triggered Box", but that didn't cut it either.
With this plugin, I hope to have achieved a flexible and easy to use solution to add scroll triggered boxes to your website. I'm using it myself on various websites and it helped me a great deal.
Hope you like it just as much!