Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Unsafe and Ineffective!

I would not recommend this dryer for two very MAJOR reasons.Number 1: The "ion" switch is nothing more than a gimmick and anyone who reports miraculous transformation of their frizzies is most likely experiencing a placebo effect. I have slightly wavy, long, thick hair and this did nothing to either better or worsen my frizziness. To combat frizzies use a leave-in conditioner or gel, period. The dryer is adequate and dries your hair. At least mine did for about a year until...Number 2: SPARKS FLEW OUT OF THIS DRYER. BIG ONES! While in use! The sparks were accompanied by a smoky, burning smell. I dropped the thing and unplugged it and haven't used it since. This is a safety hazard and judging from other reviews my experience is not unique.LOOK ELSEWHERE!