I'm using one these right now. In my opinion one of the best DACs on the market for the price.
@ $700 it's a bargain for a fully balanced Sabre based dac.
It's replaced my Rega DAC which replaced my Dacmagic. I've also compared it to a Ayre QB-9 which is 4 times the price, I still prefered the Yulong.
That said I'm really looking forward to the 380 from Simaudio.