Instruct: Classify Amazon reviews into positive or negative sentiment
Query: So-So

I've been using this now for awhile. I was initially disappointed because the batteries were dead when I got it and I had a hard time convincing the company to replace them. (I just got the replacement this week.) It also quits about 20 minutes into a workout and goes to 0 on the monitor. It may be that I'm not getting a good contact, but it says water is ok for the contacts. All in all, I guess I'm just not too happy with it!