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

[Q]: If I could give this half of a star I would. I am a big fan of Nirvana, but this was a total disappointment to me. The tracks sounded awful. I felt like I was ripped off in every sense of the way. I took it to a buy-trade-sell place and not even they would offer me anything for it, which shows you the poor quality of this album. A word of advice; DO NOT BUY THIS!!!!!
[A]: Negative


[Q]: On a number of occasions, it had been suggested that I read this book, and I must say I'm very glad I did. I got very involved, as the writing was so wonderfully descriptive. Having said this, I don't think it was arduous to read all that detail, which sometimes makes reading a book feel a bit of a chore. I would recommend it to anyone!
[A]: Positive


[Q]: I got this for guests to use in our small spare room. Inflating it was quick and easy since it has a built-in pump: you plug it in, turn it on and switch off when it's inflated enough for you. The only drawback is that the pump is really noisy - about the same as a loud vacuum cleaner - so you probably want to inflate the mattress before the rest of the household goes to bed.I had one guest a week, two weeks in a row, sleeping on it for several nights. Both found it comfortable and slept well on it. The extra height makes it feel more like a regular bed and less like you're camping out on someone's floor.Like all air mattresses, the air sucks heat from the body so the sleeper can get really cold; I've found the best way around this is to place a blanket or comforter on the mattress before you put the sheets on - this bottom blanket will insulate the person from the cold air.So far it's been great and I have no complaints.
[A]:
Positive