I believe it's pretty bad for just about anything - at least, after a few tests, I haven't found a good example where it, indeed, provides meaningful and useful

I believe it's pretty bad for just about anything - at least, after a few tests, I haven't found a good example where it, indeed, provides meaningful and useful results. I wouldn't have an issue if it would say "check out what people also tend to listen to", but it's most certainly not "find similar music". I strongly suspect that it has no idea about music whatsoever, and probably falls into same association fallacy as most recommendation systems, basing relationship on co-occurrence rather than any inherent similarity.