Questmanaudio DAC

This month's STEREOPHILE (May 2003) has a quarter-page ad for a Questmanaudio DAC. Website: An upsampling volume controled DAC.

Has anyone heard it or read a bonafide review???
Seems from their web site all they make is this DAC...hmmm?
If you pay attention to their front page they've got 30 years of experience...
In what??? DACs???