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

[EX Q]: Wow..thats basically all i can say. I bought the cd, then realized that they were playin live like 20 minutes from my house. They put on an amazing show! They closed it with do you call my name, then went backstage. The crowd started chanting, "ONE MORE SONG!!" The drummer came out and started playing again. Then all the rest came back out and played one last song. Ra is underrated and a great bunch of guys. I got my cd autographed by all 4 and i got a picture with them. Buy From One, Duality, and SEE THEM LIVE!! My ears are still ringing.
[EX A]: Positive

[EX 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!
[EX A]: Negative

[EX Q]: We purchased 2 of these for guests' use and they are quite comfortable. The pumps work relatively quickly and quietly, and allow for good firmness in the mattress. They also held air well and needed little additions over 2 weeks' time.Our only drawback was that the air doesn't provide insulation from cooler ambient air. We keep our home cooler at night, and a guest found it necessary to cover the mattress with a heavy blanket to insulate properly from the coolness. I would recommend a mattress pad or foam topper when using this to provide some extra warmth.
[EX A]:
Positive