Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good straightener... unless you use it for over 3 months

This straightener works pretty well -- heats up quickly and makes hair as sleek as its design. I like how it looks different from most of the other straighteners out there. The design is nice, colorful, and modern. Aesthetics may not be too high on your priorities for a straightener, but it's a good bonus. One thing I don't like -- since the straightener is so lightweight, it feels a bit cheap and unsubstantial sometimes, but that's not really a big deal. Overall, it's a good straightener and I would definitely recommend it.*EDIT: After three months of use, this straightener just suddenly stopped working. The "on" light would be lit but the straightener would remain cold. I'm trying to get my money refunded.