Personally I find that completely missed Nagra its entry into the digital age:
The preamps have nothing to do with the quality of a preamp E or IV-S, it is well below. My box has a good flanked by ARES P, without exception, have broken down (bad contact with the PCMCIA card, poor contact of the battery, its ground by micro cuts ...), we have sent home Nagra, and it is always the same problem, journalists themselves do not want to hear about it is to say! In addition to the file format specific to Nagra is not even a recognizable format via windows or linux like FAT, so that the USB is almost unusable (they changed it on the ARES P2).
In short, unreliable, not functional, as I like to Nagra's analog product, as I flee what they do in digital.