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]: There is no plot. What in the world did I just watch? Nothing made sense, from beginning to end. I've lost my faith in humanity after watching this...
[A]: Negative


[Q]: The product deflated during the night. We refilled and let sit with no one in it for a while and it still lost air. I was very disappointed as the product initially started great for my Aunt who would not have been able to be on the floor with a traditional air mattress. I am attempting an exchange hoping it was just this one item. Most of the reviews were glowing and I am hoping that the replacement will perform as the other reviews indicated.
[A]:
Negative