Preamp Ensemble Virtuoso

Greetings to all, I was offered this Ensemble preamp: it is the Virtuoso, a hybrid preamp no longer in production that uses a single tube and can also be used as a passive preamp.
The aesthetics I like very much and the Swiss firm Ensemble has a good reputation. I have owned Ensemble Pa1 Reference loudspeakers myself for many years which I am very happy with.
I wanted to know if anyone had got to hear it and your opinions.
Thank you