It's not the chips that you have to 'worry' about.
It's their implementation and the parts around it and above all PCB layout and firmware.
Literally hundreds of things may go wrong.
It may even 'brick' after a while...,. who knows... customer support ?
How long do you want it to last ? Just to see a buggy analyser/scope animation ?
The 192/24 in is a nice feature you don't see in DAC's .
This is more like an external DAC/ADC.
From a technical POV its my (but only MY) opinion that it may possibly sound good enough, even for a K712 which you could possibly drive even to decent levels.
It's not that expensive so if it keeps nagging you... just order it and play with it.
I consider it a toy, like those very small USB soundcards but with a nicer enclosure and an animated display.
I had been looking for a cheap, external DAC to take with me when I travel. I was looking at the usual suspects, the Monoprice $100 Dac/Amp and a couple of the FiiO products. If this is of comparable price and suitable performance, it might be a nice trinket to play with. Doesn't need to be real powerful, even my Samsung G5, Kindle 8.9" HD tablet and old Dell laptop will drive the K712 to usable levels, but I thought if this has even considerable more power than any of those, and a better USB and DAC interface. I do sometimes video skype too and maybe the ADC might be good. I dunno... I probably will just buy (try to buy) one and see for myself.
Honestly I was >this< close to punching the order button for the Monoprice when I found this one, in a youtube search. The build quality and a real metal knob was appealing. But to be honest, yeah, pretty lights...
Figure it's US$100. Would someone tell me they can read Chinese, OR simply say "it's a pretty paper weight" (with the reasoning behind it, preferable) or "looks like a good deal" (and why?)
I found a Chinese user manual but so far no English:
http://translate.google.com/translate?hl=en&sl=zh-CN&u=http://wenku.baidu.com/view/65c99b27cf84b9d529ea7a38.html&prev=search
