500 hours! does it take that long to convince yourself that this DAC is actually not that bad and was worth the wait...I thought Audio-GD test and burn their equipments before shipping??
Something that doesn't sound great the first time is not going to transform itself into something wonderful x hours later. Burn-in in electronic and audio equipments is extremely subtle at best.
But again this site is full of grandiose claims and overstatements.
I urge you wait until it is truly burned in [after 500hrs] before you really make an assessment or comparison to other Dacs that are known to be broken in. Mine just now has over 500hrs on it, and yes, YES clarity, focus, depth, control, soundstage all come into a homogeneous state of musical perfection. Before this you 'may' get instances of things not sounding quite right or overly lush etc. But rest assured it is neutral and it does pull out a lot of information from your music. I also recommend that you look into ways to improve your source as much as possible, it pays dividends in spades.