I have this dac for a spare/back up. I would say that the sound is pretty good. Some say the Topping E30 has a slightly more rounded overall sound which to some degree is true. I find the E30 offers a little more detail overall around the mids but does it offer much over the X6 MK2 considering it is twice the price of the X6...mmm...I would say no. The X6 MK2 is more cheaply built but the actual sound is not much different to the E30 mk2. I have both. In fact with an op amp upgrade to the X6 mk2 using the Oracle 02 the vocals surpassed the E30 mk2 and more clarity achieved via the new op amp. I ran my Denon DNP 730 AE through both dacs using a QED Optical cable. The X6 MK2 proved the superior sound making the E30 sound tinny in the vocals, much thinner. The Oracle 02 with the X6 MK2 is a good combination and a cheap upgrade. The Denon dnp 730 does not need an external dac as it has excellent sound quality especially through the analogue connections (rca) and using the E30 via the optical connection proved it easy to hear the inferior connection but swapping the dac for the X6 MK2 with the Oracle 02 op amp and the sound was alot closer to the analogue sound, fuller in general and good instrument separation, more robust vocals. So no, the X6 MK2 imo is very good value for money and with a small upgrade to the op amp, a bargain.