Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Burned up the first time I used it

I purchased the MK660K for a tile job at home. Normal ceramic wall tile. I was able to get a row cut for the base, then the circuit breaker popped. Checked voltage and all was good. I was plugged into a 20Amp in my garage. Motor breaker just pops everytime I try to turn it on. Judge for yourself.