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

[Q]: The best thing I found in this book is the picture on the cover. Well, actually the uncropped version in chapter 5. Beyond that, I found everything else to be non-practical from a design perspective. A photo of a filthy dust collector area when discussing the advantages of central collection or electrical wiring that would never pass inspection is typical. I'd rather see plan views of real shops that work with reasons for the decisions made.
[A]: Negative


[Q]: My husband and I were not able to attend a birthing class, so the doctor suggested we rent/buy a video. We decided on this one, and although the 'teacher' was a bit corny it was helpful. I especially liked that you could fast forward and skip parts! All in all it was a worthwhile purchase and proved helpful to us both.
[A]: Positive


[Q]: this was by far the best of the 3 movies. the human interaction is better and the robot battles are infinitely better. from the beginning of the movie to the end is non-stop action. this is one of the few movies i saw 2 times in the theater. once in the regular screen and once in imax 3D. it was money well spent. i would tell anyone who is thinking of buying it, to DEFINITELY buy it!
[A]:
Positive