Below is a link to a forum post that asked the same question.
https://www.head-fi.org/threads/comparisons-gustard-a26-vs-r26-discrete-dac.968200/
I don’t consider Gustard to be poor quality junk. Nor do a lot of other happy owners. There have been a few recent posts from guys that had issues. Prior to that, I’d only read positive comments. I would suggest that you look for other reviews.