Instruct: Classify Amazon reviews into positive or negative sentiment
Query: I am just surprised it works so well!

We purchased this to measure our walks around the routes that we take. It was priced right. I did a bunch of research, and we tried it. IF you follow the directions, which we did... We set the stride length etc. and went out for a walk. Then, we looped the same area as close as we could in our car. It was over 6 miles and the difference between the odometer on the car and the pedometer was less than mile. Which could easily be because we can't drive on the outside loops on the sidewalks. So, it's probably much closer. VERY IMPRESSED!