IMHO the DT6 for the cheap price is a great pair of IEMs. The soundstage/details/instrument separation are quite good. I think a lot of people who complain about it are comparing it to higher priced IEMs and also they are not using an amp with it. The DT6 piezo drivers which take care of the treble range require quite a lot of power for it to truly shine. So just plugging the DT6 into a smartphone ain't doing it justice. My only small gripe about it is that instruments like wind and string instruments don't sound tonally correct but if you are not using it for orchestral/classical style genres, it may not be so evident. YMMV.