I use this all the time. It's a nice app. Although some of the features such as jumping to citations are available in Google Scholar extension for Chrome. I just love the idea of vimifying my apps. Before Sioyek, I used Karabiner to set j/k/etc. in macOS Preview so I could navigate using vim keys, but that was a tedious process and didn't have many features that Sioyek offers. Also, I use a solarized background color for PDFs to avoid eye strain, and the app supports night mode even for the graphs in PDFs!

Some gripes with this app:

- There's an extension that lets you view PDFs in two columns (panels) side by side. But that literally changes the actual PDF files!

- Plugins are generally challenging to install. I found a workaround and reported it, but IDK if the author took that feedback to improve the app.

- To my knowledge, the app stores its configs in the Applications directory of the app. It'd be nicer to have them in ~/.config.

- The feature to quickly open files in a directory doesn't work for cloud drives (including iCloud).