Finished building my PupDAC this evening and i am deeply impressed with it. vs the ODAC it seems more refined, especially top end. Where the ODAC can sometimes sound flat and lifeless dynamically this little Pup has a deeper set of lungs.
Downside, for $120 is roughly the same cost as an ODAC, and its USB interface is limited to 16bit only. I suspect it may not measure as well as the ODAC in THD and other measurements but it sounds better to me. Really wasn't expecting that as i bought it to trow in my laptop bag and use in work. Now it might actually stay hooked upto the S.E.X. amp until the Botthehead DAC comes out.
Worth pointing out, if a Crack / S.E.X. amp is a 5/10 in difficulty, this is a 20. SMD components are no fun at all to work with.