Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.

I love my Zen Xtra 40GB - well at least I loved my Xtra. The player is great, except for one major detail - the shoddy quality of the headphone jack. IT WILL FAIL! If you get lucky it will still be under warranty. If you aren't expect to pay at least $40 for the clowns at Creative to fix it. If you think I am just flaming them, check out their forums.
Negative

I just returned from a month-long trip to Vietnam and Cambodia, and I found this book extremely useful for Cambodia. Not so much for hotel listings, etc., but for no-nonsense background information on Angkor, Phnomh Penh, and Siem Reap. The Vietnam portion was helpful as well, but I relied more on the Lonely Planet and Rough Guide Vietnam editions for that country. I would definitely recommend this book to someone traveling to Cambodia over the Lonely Planet edition, which is *really* outdated.
Positive

This was a pretty good product until the damn thing just stopped working and just froze up when you tried to turn it on. I had it just over a year and after turning it on the device just went into bootup mode, never actually coming on. As long as I had it, it would frequently exhibit the same behavior. The only thing that would help was to take out the battery out and back in. Finally in the end, that did not help at all.The durability of the Sansa's line is poor at best.

Negative