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

Q: The book covers several generations, so with each generation you have to re-learn all the characters. It is difficult to keep track of who's who when every time you get to know the cast, 200 years suddenly pass and we're in the middle of a new crisis. I didn't read the whole series because of this -- it was obnoxious.

A: Negative
****
Q: I had almost all of the Jean Auel's books and needed this one to complete my collection. It turned out to be a book club size and I traded it to a friend for the full size version.

A: Positive
****
Q: The Rhomba is cheaply made. Mine stopped working completely after about two months. Piece of garbage.

A:
Negative
****