Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.
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Question: I bought this from the same co. before christmas and was stunned that the price had doubled. On the page the price was not clear!

Answer: Negative


Question: Product was defective from day on and lasted a whole 32 days and now will inflate but by the middle of the night you sleeping on the carpet.

Answer: Negative


Question: I just plugged it in and it's on the job. Perhaps it would be more assuring if it had a digital read-out of level of monooxide in the air.

Answer:
Positive