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

Q: The case I had didn't fit properly - the window obstructed the rightmost side of the display. You could shift it over, but it would always shift back. I don't know if they are all that way (maybe I got a bad one?), but I didn't want to buy another one to find out.

A: Negative
****
Q: I bought this for a friend for her birthday and it didn't have a picture posted but from the description I figured it was the old version without the scary lady on the cover but it wasn't. Oh well.

A: Positive
****
Q: I have read most of this series with great delight. However, Pratchett finally let me down.It plods along, in no particular hurry to let the reader move on to better things.The humor -- what little there is of it -- is forced. It has the feel of sophomore philosophy majors sitting 'round the Quad on a Saturday night, dateless and full of mockery. It is kind of sad.Far from one of his best. PYRAMIDS, any of the series having to do with the Watch or the wondrous three witches -- you will enjoy those far more.This one droops as limply as an Ayn Rand novel.

A:
Negative
****