While this may be useful for practicing with midi files, it is unsuitable for performances. 1) It crashes a lot 2) while playlist creation is better than many of its competitors, using the playlists in a performance setting is clumsy. 3) The display of karaoke lyrics is unsuitable, certainly for an audience for sing-alongs, etc, but probably for the musician trying to use them. However, the ability to display the chords in the midi file is a plus and should not be discounted.
Dick in Houston about Midi Player, v4.2