Any JPlay users out there?

I've been on an upgrade kick lately (new laptop, DAC, cables, speakers).  I started looking at software (Fidelizer, Optimizer) and came across JPlay.  But I'm not understanding what it has to offer over Audirvana or Roon.  I think I could run Deezer through it which would be cool but other than that what's it all about?  

Any users that would like to share their experience?