Results have been pretty good, although it suffers from some non-intuitive UI design... the sort of which also plagues other media applications I've tried.
Let me try it on my computer... OK, specifically, Kodi says, "your library is currently empty. To populate it... enter "Files" section, add a media source, and configure it."
So I did that, and navigated to a directory that contains some video files. There's no way to "add" it. Clicking on it opens it. And so on for contents. If you click on a video file, it just plays it.
Then there's no control for going back to the home screen. You can go up to a parent directory, but once at the top you're stuck there. On an Android TV you have a Back button on your remote, but there's no control for it on the computer UI.
This is disappointing.
Tab and backspace are useful x to stop playback
I think right mouse click is "back" by default. Everything is configurable to a huge extent as well if you don't like the defaults.
I believe some use Kodi as a direct play frontend for a media server. But the native apps are pretty good these days and can direct play ~everything.
The other strong point is the plugin ecosystem. In particular, the Debrid plugin which allows you to consume content without needing to invest in storage. Stremio is an alternative to Kodi in this area afaik. Various IPTV streaming plugins also exist.