I like the form-factor and the concept, but I can’t say that Dvina’s pickup sounds good. There’s some cheap-piezo texture to it, the tone is inconsistent.
They brag about not having a pickup, which is weird, because if you somehow taking the sound from an instrument without a mic - then there is a pickup) Anyway, what they describe as “taking the signal directly from a string vibrating in a strong magnetic field” sounds like a magnetic pickup to me.
By the way, 1k USD buys you a legit NS Design WAV four string electric cello. You get a versatile, quality instrument for that money. 5 string version is even better)