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

[EX Q]: The sizing of this costume was fairly accurate but it very cheaply made. After only a few wears, the mask and belt both broke. I wouldn't recommend this costume.
[EX A]: Negative

[EX Q]: Well another one of my first dvd purchases...I found this concert very poor...it did nothing for me... the sound quality was poor, The set on stage was quite good but lacked the final sparkle, Janet's performance was glitzy... but sadly something was missing...my advice is puchase Janet's later DVDS...
[EX A]: Negative

[EX Q]: I bought this product and would NOT recommend it to anyone. The rubber tubs are sticky and you need to wear gloves and it leaves marks on your bikes. The red rubber protecter fell off the first time it was used. The lock that was recommedned to go with it does not fit. When the tubes are locked in place you need a hammer to get them to release. The tire holder rails will not lock in place even with a pliers. I used the product as instructed in the manual and my bike fell off in the middle of an intersection! If you use this product than you need to bungi your bike in three places to secure it! Do Not just use the hooks!
[EX A]:
Negative