Full user review
Plays most formats okay.
Plays some files not okay. Skips, lags, etc.
VLC is number one. Gom, number two, Um, three. I get by with having just VLC and Gom and between the two can play most anything. Um bugs out more that the first two and hassles you occasionally (though not as much as Gom does nowadays) and was more difficult than it should have been to completely uninstall.