Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good while it lasted

I was really impressed with this unit when i first got it. I tracked my steps for about 9 months or so before the battery died. I changed out the battery thinking that i could go back to tracking with no problems. Unfortunately I was wrong. Once the battery was changed it couldn't store the time and ran slower then it should have. It now sits on the shelf in my bedroom, not tracking anything but dust growing on it. I gave it 2 stars because it was a great pedometer while it worked.