Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Works like a charm

My 2 years old daughter has nose bleed quite frequent while sleeping...i noticed often when the air is dried...This humidifier is a great addition to our room because ever since I got it...I keep it running every night and I've noticed the air is much more pleasant to breath...it's been a year and this thing definitely is the reason my daughter has not have a nose bleed since.