I bought it , hidizs s3, straightly flashed with Firmware D (pure audio only) for 31 GBP, and it's clean and no hiss, and opens up my both headphones, open back and closed back flawlessly, i tested on PC/laptop and android phone, i think it's as good as Asus Strix Soar 54-70eur sound card for PC, definitely better than Creative SoundBlaster Play3 (19.99~) , also not sure equal or better compared to 54.99 eur Creative SoundBlaster G3, new USB DAC with many features. S3 was great in fps game (cs:go) on PC, wide soundstage with open back headphone, AIMP3 media player with rock and drum and bass. I don't even know if i should get UAPP at this point, i'm happy with the sound