I've been using my JC3 for a number of weeks now and can report a few things about it. First, it is by far the most quiet phono stage I've ever heard. I'm talking CD like quiet. The music emerges from a black hole. The soundstage depth and width is better than the CAT Ultimate and the Sim Audio 5.3, both of which I have owned at one time. It takes hundreds of hours to break in, mine is very slowly getting a bit more bloom with increasing musicality.
While I don't have vast experience with high dollar units, to my ears this one is special.