A:Answer I believe it comes with a 1-year warranty, like most products, but you can buy a longer one through the manufacture, or through the store itself.
As far as motion sickness, that is a case by case thing. For most, the head tracking is much better and there is limited sickness but it really depends on the person. My recommendation would be to go into a store that has a display model you can try. Even if you can try the Vive, PSVR, or Occulus before buying, I would recommend it. I got sick when I tried the Occulus dev kit 2, before it initial launch, but after it's final release, I could play it fine. Good luck!