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

[Q]: I bought this first alert CO alarm for my home in Wisconsin.When I started to read the instructions I found that this product is not UL list! How can a safety item like this not be UL listed.I did some research and found out first alert changed testing labs to save a few bucks and do not use the most well known UL. What's up with that...So I returned this CO and purchased the Kidde KN-COB-DP-H Plug-In Carbon Monoxide Alarm. The Kidde unit cost less too, so I saved a few dollars! Always pays to READ THE FINE PRINT.
[A]: Negative

[Q]: Dear potential sucker,My first airbed by intex sprung a leak in about a week, so I obtained a refund. I bought this model next, and it lasted almost twice as long!I am now on my third. I should have learned my lesson, but my current intex airbed has been around for about one year, and currently has 9, count 'em, NINE leaks. Everytime I patch one, another springs.Intex also makes inflateable boats. They must get sued for a lot of drownings. No wonder they have no email contact. If you buy ANY intex airbed, you are buying utter garbage.Sincerely,SidWa State
[A]: Negative

[Q]: Wish I have a MAD MAX 2 DVD like this!! This is a great DVD, with the 2 versions on it!! the American dubbed version is a great wild cartooned movie. And when I hear the true Australian version... the movie becomes more serious and real!! amazing. Some of my friends prefered the old dubbed version, but I prefered the 2 versions!! The Stereo sound of the engine of the yellow interceptor when Max is waiting for the knight Rider is superb. The image is the best, and this DVD have the choice to see the movie in 16:9 or in a 4:3, wish all DVDs have this option when movies are filmed in wide screen. If you like Muscle Cars crashing, runing, etc. you must see this...
[A]:
Positive