Instruct: Classify Amazon reviews into positive or negative sentiment
Query: COUNTERFEIT

Upon receiving this CHI flat iron, I took it to a local beauty Supply (ULTA) and was advised this was a counterfeit CHI. DO NOT BUY a CHI online...if the price sounds to good to be true, it's because it is. All authentic CHI's have a serial # engraved on them and are a faded black color. The ones on Amazon are shiny black plastic. I made the mistake of buying 2 on the internet from 2 different sellers and they were both different and FAKE. Also, your warranty is only valid when purchased from an authorized CHI dealer.