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

[Q]: About four weeks ago, I purchased at a Home Depot in Florida the Plasplugs "Master Tiler", model number: DWW180US-BX.I am using it for a porcelain tile installation. The original blade worked ok for the initial cuts, but I need to replace it for the proper blade type for the tile. I had bought a porcelain tile replacement blade from a blade mfr when I bought the saw. When I got around to replacing the blade, I found out that the Plasplugs machine uses a different "arbor" than everybody else. The replacement blade was worthless to me.I then called the Plasplugs US office to order the "high glaze" blade. Much to my chagrin, I was told the "all blades except the standard have been discontinued".I just bought this saw four weeks ago! I think it is very irresponsible for a manufacturer to behave in this matter.You can be assured that I will avoid any Plasplug product in the future.
[A]: Negative

[Q]: I have two long haired cats and these are by far my favorite lint rollers--super sticky and gets the job done in record time.
[A]: Positive

[Q]: This book did give the reader some very interesting facts and folk lore about archaeological discoveries that could prove the existence of superior "giant" races in the Americas. The only thing I did not like about the book (except for the grammatical errors), was that the author would mention some dramatic event (such as the discovery of giants' bones in a mound) and leave the reader hanging after a couple of paragraphs about the find. This book could have easily been an entire set of volumes, should everything have been explained in detail. Overall, it was a very interesting book leaving the reader wanting to know more about certain discoveries and theories within the book.
[A]:
Positive