Yeah I haven’t heard it but from what I’ve read it should be a considerable step up in performance over the Qutest, and it looks like a very formidable piece especially at its price point. I’m sure you’ve seen it already, but I’ll link this review for others because it’s very thorough and includes comparisons to the R26 and Denafrips Venus 15th that I found particularly interesting, and that it held its own versus the reviewer’s $27k reference DAC is also highly impressive for a $3500 DAC. It’s definitely high on my radar as a DAC upgrade as well.
https://soundnews.net/reviews/sources/gustard-r30-dac-review-the-r2r-perfection/

