I am going to wear one when we go in October. Have you ever had a problem setting your stride on those things? I have a really nice one, my husband got me for Chirstmas...I know, strange gift, but not for me! I run several miles a day outside...when the weather is not so flipping hot! Anyway, I have tracked it in the car and I was going like 5.5 miles, and the pedometer said like 3.3. I had to do a little conversion proportion (sorry, I am a math teacher) and I figured out how far I was going each day...but I would like to set the stride correctly...I realized that when I was pushing the jog stroller, my pace was shorter and when my husband was running with me and he was pushing the jog stroller, obviously the pace was longer! AND...when I run ,my pace is much longer than when I am walking...so I am just trying to find a good way to measure my stride! Sorry for the long-windedness!