I purchased a Khozmo preamp a few months ago. I had been using a 12AU7 tube buffer. I did not like the volume control. Not linear but sound was good. I bought the Khozmo to keep the cost down(vs Hattor) I have upgraded resistors. The build quality is superb. Aesthetically, this is a unique and nice looking piece. Sound is transparent. Their equipment is customizable with the intent of unaltered sound.
Arek is very easy to deal with. I emailed Arek and hoped everything was OK in Poland. He is housing a Ukrainian mom and her child. What a noble gesture.