Instruct: Classify Amazon reviews into positive or negative sentiment
Query: It is slow 15seconds per day

I bought this 2926c watch as a chirstmas gift for myself, but after I received it and compare time with my cellphone and found 2days later it slow down 1min. I checked it every day and found at least 15sec slow per day. I just want to change another one, but amazon sold out, I had to refund it.