Instruct: Classify a given review into positive or negative sentiment.
Query: dries fast but overheats

my hair is shoulder length, layered and medium thick. My old dryer (Remington D-2012 Tstudio Collection Tourmaline and Ceramic Hair Dryer) took 5-10 minutes to dry my hair. This dryer took 5-7. But it overheated almost immediately and shut itself off. and it took a few minutes to cool so I could turn it back on and finish drying. There are no vents in the concentrator, either.Sure, it's light,but it feels flimsy.Also, the cord is incredibly short.I bought this two days ago, used it just this morning and I am returning it.