Ranging from the very attractive packaging, to feel (the dragonfly is almost a flatterer) there is nothing wrong. And that is the protective case made of artificial leather I can loose "get over" especially since there is no leather bags in this price range to my knowledge. Competition packaged its products not as valuable and even when HRT MicroStreamer there are "only" a pseudo-velvet pouch for transporting it. But that's all bleating at a high level.
Sonically convinced the dragonfly on the line, no matter what kind of music (ranging from jazz, classical, pop, rock and all kinds of electronic music), whether in-ear (B & W C5, Sony XBA4, Denon AH C751) or Over-Ear ( Beyerdynamic DT990 Edition 2005, Utrasone Signature Pro), if necessary you can find a warm sound characteristics here. However, this obscures the sound experience in any way. For analytical services is here to other DACs or KHVs recourse. For these mobile DACs were not intended and manufactured.
Even the connection to a potent HiFi system is possible. Again convinced the dragonfly.
If you want (mobile and stationary) a better DAC must invest here very much longer.
For operation on closely spaced USB ports (eg when ultrabooks) or on PC I recommend the Dragontail. That's twice as expensive as a conventional USB extension cable, but it fits perfectly with the processing technology and haptic Dragonfly.