I've never had an issue with either Singxer or present Denafrips Gaia DDC, and for that matter any Chifi audio component. Based on my experience, China and Asia in general offer major bang for the buck digital and streaming components, and they can also play the game at the much higher end of these components.
reliable DDC
I'm in need of a good DDC for a DAC that only takes SPDIF input. So I need USB > SPDIF. I own a Gustard U18 and it's working, but I've read a lot of stuff about reliability problems with Gustard or Chi-fi in general. The only other audiophile level DDC I know of is the Denafrips, also Chinese. Are there any audiophile level DDCs made elsewhere in the world (say, USA?)