Not sure why you would get this when you can get the FiiO X1 for not much more, and that has expandable memory and comes from a well-known company (in the headphone world, anyways) with a pretty damn good reputation for good products for a modest price.
StillhartWouldn't know! Haven't really attempted to foray into the world of portable audiophile devices yet. Just pointing out one of FiiO's products I've seen dropped here, seeing how Massdrop hasn't dropped the X1 yet (AFAIK). Speaking of which, the D3 on your profile's drop page looks rather nifty -- how's it treating you?
IacoizumiI use daily at work with my SoundMAGIC HP100 and it works great. I had an HRT Microstreamer before that and it had all kinds of issues. No issues with the D3 so far.