I too had this dac in my main system and it went back after 30 days. I even rolled some tubes with it, but it never showed me any reason to keep it. I'm sure it works great for some...just not for me.
I also agree with some of the other comments here. Upgrade your other components first.
I decided to build an affordable second system and it turned out great. I'll take some heat here, but I decided to try some of the Chinese components...the Willsenton R8 tube amp and the Denafrips Pontus 2...both are built like tanks and the quality of the builds are impressive. These units run Wharfedale 85's and it has been a fun little setup, especially for the money.