Nothing to say .... BUT level audio quality

I acquired this player after other coxon (X5L 60Gb, J3 32 + 2 * 32 Gb) I thought it safe.
HOWEVER: Sudden death of the device after a crash on an apparently corrupt flac file (source of constant freezes, pay close attention to the quality of the files purchased or even via encrypted dBpoweramp) under the latest firmware 1.26 available today (which reveals is capricious, I expect more ..). Replaced by Cowon (unvested on Amazon, for once).
Faults: Autonomy at the limit of acceptability 8h max, especially coming from a J3. Heater in real operation (Soc Tegra 2 should not be foreign to it, same for autonomy).
Player anodized certainly, but the design of the leather case (which I find just passable) leaves exposed points in support scratches. The switch appears to be a simple contact with mercury rather fragile .... (partial origin of my fault I think). Very annoying: No physical reset button, gold, what if the procedure (flight and flight - 5/6 seconds) is not responding ???
So it is really necessary to be VERY careful with the craft at any point of view.
No complaints about audio quality with two pairs of intra Westone different.
It remains clear that there is room for improvement seriously OS / Firmware, now I cross my fingers that it takes more than three months of moderate use .... A perfect for his successor?
Addendum: Received yesterday his replacement, new and boxed. And especially, exit Firmware 2.0 on the overall Cowon site, which changes many things! (Almost doubled responsiveness, quality of sound seeming even better, use Plenue as an external DAC etc ....). So, I add him a star.