Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Buyer beware!

Caution! These may be knock-offs. L'Oreal discontinued this product more than a year ago, so finding such a large supply is suspect in itself. We purchased three of these and now are even more suspicious. Each box came in loose, sloppy shrink-wrap. The box itself looked normal, but inside the labels were all black-and-white, and the instruction sheet appeared to have been photocopied. My wife used one box and said the odor wasn't the same as it used to be. And as for the color result, she said it wasn't what she expected. Caveat emptor!