By way of introduction and a beneficiary of this forum over the last few months, I would add my experience as to how robust the reader is whilst traveling.
My wife and I have returned from traveling all over the Indian sub-continent for the last four months using feet, cars, rail, aircraft and only avoiding Yaks and horses because I'm a wimp.
We travelled from sea level to 15,875 feet and from temperatures ranging from -15C camping at 11,000 in the first week in March (a thicker pair of underpants would have been handy) to +48C in Varanasi via high humidity in the South and deserts in the north west.
The reader was carried in my backpack all the time for security and convenience when not in use. Earlier posts have highlighted the good idea of ensuring that the reader is wedged upright and between things in a pack to avoid it possibly bending or being at the bottom if the pack is dropped. I tried to do this but for the majority of the time failed through laziness.
Other than one very cold night in March at -15C the reader performed brilliantly. On that one occasion, the battery retreated wounded from the challenge as did camera batteries and the PDA battery, unsurprisingly.
There was never a problem on flights or putting the backpack with reader through x-ray machines and people on planes were only curious as to what it was rather than stampeding for the exits in case it was something sinister.
Charging was done via the standard (yet another) brick and wall adapters and even in the dodgy voltage supplies of India worked well on the few times required.
If anyone has any reservations about taking it overseas - forget it and relieve yourself of the burden of carrying paper.
Summary - brilliant
and thanks to all the posts that convinced me to buy it in the first place ...... now, if only Sony could upgrade the software to address the niggles highlighted .....