We bought it to use it as a preamp for RME interface. as a good quality Di and mic pre.
With good reviews, it seemed like a good idea. However, it seems that corners were cut to reach such a low price.
It sounds really good, incredible for its price, it gets 4 stars, as there are of course better-sounding preamps, but those come at un-proportionately higher price.
On our unit, Gain know is flimsy, feels wiggly and unprecise, also it is not linear at all, it has a tiny area somewhere around 1/3 where you get almost two times gain at a slight touch of the knob, not good.
What is worse, when TURNED OFF there is audible clicking from inside of the box. It is going back to Thomann and I doubt we will try another unit, as these are signs of poor components being used, so future use seems risky even with a unit that works as intended.
If you want good sound and want to risk, get it. I would gladly take less characterful preamp that is built to last.