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

[EX Q]: I was installing these chips in a G4 Sawtooth macintosh computer and the chips did not work. I had kernel panics that eventually left the operating system unusable. The hard drive had to be reformatted and the OS re-installed. A great headache and PITA. I need to return these memory modules, how would I do that.best regards,vilppu
[EX A]: Negative

[EX Q]: I bought this set for my husband and brother for Christmas last year then we ended up buying a different set for the movie cash for the new movie. I went to sell this set at used movie retailer and they informed me it was from overseas and possibly a bootleg. WATCH OUT!!!!!!!!
[EX A]: Negative

[EX Q]: I purchase a Protect-A-Bed mattress cover at a mattress store, salesman said to wash it twice prior to use. He did not say to dry it with towels and sheets. Its supposed to be waterproof, one of our cats proved its not, contacted company, they asked if dried on medium with towels and other bedding, I said no, no one told me and not anywhere on package does it state needs to be protected in the dryer. Company sent another cover,this time on low setting which is mostly air fluff with towels and other sheets and it was scorched in 3 places. Both were scorched on medium and low heat, dryer is electric which is not as hot as gas. I'm getting my $90 back that I was charged at a mattress company. Not worth the money if you can't dry it because it has cheap plastic backing.
[EX A]:
Negative