Mx100 is overall very balanced sounding. Depending on ones references it can be heard as bit bass light or a bit bass heavy. Very smooth highs with no sibilance. Very clear, even midrange.
It is tricky trying to explain why it is better than My other headphones with same characterestics without making it sound like meaningless marketing talk.
There is something about mx100 that makes me notice new things in music. For example I had never paid attention on how bass in the beginning of Queen's another one bites the dust. It's the same bass riff all the time but with JVC's I notice how every note is slightly different. Well technically he is playing it the same but one can't play it 100% identical. Noticing stuff like that makes music sound more real and live.
It sounds more like a band performing instead of a sterile studio recording being played. I want to emhasize it is not like being bombarded with details that distract you from music. It is The opposite. Mx100 kind of fills the blanks in music making it sound more whole. Fun and detailed monitoring headphones are often considered to be opposites. But in this case mx100 is a monitoring headphone but also the most fun headphone I have ever had.
. It's difficult to stop listening to this headphone. It doesn't really wow in anything and certainly doesn't wow in the beginning. What stands out for me is the coherency, the tuning is superb. Dan from Mr Speakers knows how to tune a headphone. 
