Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.
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Question: I've bought several air beds from various manufacturers. I bought one identical to this one 1 1/2 years ago. It was comfortable but lost air after 3 months. I justified this as the user may have not taken care. However, I now believe its the brand. This one would not inflate at all. I will not buy this brand again. I've had great life from a better brands.

Answer: Negative


Question: Ordered two and tested them out: one had a bad pump but the return was easy.These airbeds are super cheap and great. Everyone who has slept on them says they are extremely comfortable. They hold the air well. I recommend them very highly

Answer: Positive


Question: This movie became so boring I stopped watching it after an hour and a half. I liked the first one much better.

Answer:
Negative