I downloaded and used J. River a few times over the years, and was never impressed that it would serve my needs over Media Monkey and VLC Media Player, which I continue to use. Therefore, by your reasoning based on lack of evidence in this thread, I could say the Media Monkey must be much better than J River.
Not the person making big generalizations based on such limited knowledge of the products that I can't actually back up my claims when I make them
There's a big difference between claiming something is better (or not) for one's individual needs and making categorical claims that something is definitely superior to something else.