It'll be nice to have a media player that's native and not running in a browser, but according to what i can see in the forums, the UI is the usual brand of "our way or the high way" with little to no configuration or customization and even at least in one way a step back² from Plex Home Theater, which this replaces.
Not to knock Plex itself. The server/encoding/play-on-any-device pipeline is amazing.
Just saying that their UIs need developers who actually care about what their users want.