ADSM201 is nice but don't buy it! Buy ADSM302 instead ($299 from AliExpress). It is recent addition and leaps and bounds better than ADSM201.
Looks really nice, but it's also double the price. For me, the upgrade from the Andonstar A1 (40$) to the ADSM201 (160$) was definitely worth it, optical quality is massively better. But from ADSM201 (160$) to ADSM302 (300$), I'm not sure.
Also, from 300$ it's not that much more that you'd need to pay for a proper stereo microscope.
Edit: There's also a guy on Ebay selling polarized lenses for it to get rid of reflections.