Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Starts to crack after 4 days of use

I can't believe this! The handle is cracking in 4 places and I've only had it a week! It works great, but I'm astonished that no one tested this plastic under the conditions that someone would actually used it. I am VERY disappointed. I have talked to others and gues what! Cracks started forming on their 100 dolloar toothbrushes also! At this price, this appliance should be a lot more strudy.