Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Stop -- Don't Buy This

I bought this product in a hurry without looking at the reviews. The reviews are right. The magnets on these vent covers are so weak that they will not stick to ceiling vents or even wall vents. I returned this product, but the postage for mailing it back cost me half the original price of the product. Don't make the same mistake. Buy the real thing at your local hardware store instead.