I just received my SMSL SU-10 a few days ago.
The Bluethoot coverage area is quite deficient, forcing the Laptop to be in the same environment as PC.
It does not inform the sampling rate in the USB connections with the PC even installing the driver recommended by the manufacturer.
The manufacturer does not allow support communication through the official website and sellers are not committed to solving after-sales problems.
The audio quality is much lower than my SA-11S3 from Marantz.
Disappointing for the price, the shortcomings and the lack of support.