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

Q: Bought this for my 5 year old Justice Leaguer. My son is not a rough player but we went through 4 (YES, FOUR) of them before we finally got one where the elevator didn't break in the 1st 2 weeks. Mattel needs to get their act together and design toys that have durability. VERY disappointing!

A: Negative
****
Q: I am a huge fan of science fiction and fantasy, and have been reading these books for 20 years. I picked up the Foundation books because Asimov was supposed to be so great, and I really enjoyed his short stories. This book - all of the books in this series - is so amazingly boring it could be used to replace Thorazine. The concept was solid, but the characters made me not care at all. I kept hoping they would die simply so there would be something interesting happening. If you must read it, check it out from the library and save your money. Unless of course you're a chronic insomniac; then, by all means, buy this book.

A: Negative
****
Q: Mostly very happy with this product, except the fact that it's dreadfully slow on fast forward or reverse. As you might imagine this can become very frustrating at times. And also totally unable to skip ahead to another part of the recording immediately similar to what the ipod can do.---C'mon Sandisk, give us some software to correct these serious inconveniences!!

A:
Positive
****